maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity
llvm-project/llvm/test/CodeGen/X86/test-vs-bittest.ll

394 lines
9.1 KiB
LLVM
Raw Normal View History

[X86] Add test cases for opportunities for using BT instead of TEST under optsize. llvm-svn: 325277
2018-02-16 03:00:11 +08:00
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=x86_64-unknown-unknown | FileCheck %s
define void @test64(i64 inreg %x) {
; CHECK-LABEL: test64:
; CHECK: # %bb.0:
; CHECK-NEXT: pushq %rax
; CHECK-NEXT: .cfi_def_cfa_offset 16
[X86] Only reorder srl/and on last DAG combiner run This seems to interfere with a target independent brcond combine that looks for the (srl (and X, C1), C2) pattern to enable TEST instructions. Once we flip, that combine doesn't fire and we end up exposing it to the X86 specific BT combine which causes us to emit a BT instruction. BT has lower throughput than TEST. We could try to make the brcond combine aware of the alternate pattern, but since the flip was just a code size reduction and not likely to enable other combines, it seemed easier to just delay it until after lowering. Differential Revision: https://reviews.llvm.org/D43201 llvm-svn: 325371
2018-02-17 02:51:09 +08:00
; CHECK-NEXT: testl $2048, %edi # imm = 0x800
; CHECK-NEXT: jne .LBB0_2
[X86] Add test cases for opportunities for using BT instead of TEST under optsize. llvm-svn: 325277
2018-02-16 03:00:11 +08:00
; CHECK-NEXT: # %bb.1: # %yes
; CHECK-NEXT: callq bar
; CHECK-NEXT: .LBB0_2: # %no
; CHECK-NEXT: popq %rax
Correct dwarf unwind information in function epilogue This patch aims to provide correct dwarf unwind information in function epilogue for X86. It consists of two parts. The first part inserts CFI instructions that set appropriate cfa offset and cfa register in emitEpilogue() in X86FrameLowering. This part is X86 specific. The second part is platform independent and ensures that: * CFI instructions do not affect code generation (they are not counted as instructions when tail duplicating or tail merging) * Unwind information remains correct when a function is modified by different passes. This is done in a late pass by analyzing information about cfa offset and cfa register in BBs and inserting additional CFI directives where necessary. Added CFIInstrInserter pass: * analyzes each basic block to determine cfa offset and register are valid at its entry and exit * verifies that outgoing cfa offset and register of predecessor blocks match incoming values of their successors * inserts additional CFI directives at basic block beginning to correct the rule for calculating CFA Having CFI instructions in function epilogue can cause incorrect CFA calculation rule for some basic blocks. This can happen if, due to basic block reordering, or the existence of multiple epilogue blocks, some of the blocks have wrong cfa offset and register values set by the epilogue block above them. CFIInstrInserter is currently run only on X86, but can be used by any target that implements support for adding CFI instructions in epilogue. Patch by Violeta Vukobrat. Differential Revision: https://reviews.llvm.org/D42848 llvm-svn: 330706
2018-04-24 18:32:08 +08:00
; CHECK-NEXT: .cfi_def_cfa_offset 8
[X86] Add test cases for opportunities for using BT instead of TEST under optsize. llvm-svn: 325277
2018-02-16 03:00:11 +08:00
; CHECK-NEXT: retq
%t = and i64 %x, 2048
%s = icmp eq i64 %t, 0
br i1 %s, label %yes, label %no
yes:
call void @bar()
ret void
no:
ret void
}
define void @test64_optsize(i64 inreg %x) optsize {
; CHECK-LABEL: test64_optsize:
; CHECK: # %bb.0:
; CHECK-NEXT: pushq %rax
; CHECK-NEXT: .cfi_def_cfa_offset 16
; CHECK-NEXT: btl $11, %edi
; CHECK-NEXT: jb .LBB1_2
; CHECK-NEXT: # %bb.1: # %yes
; CHECK-NEXT: callq bar
; CHECK-NEXT: .LBB1_2: # %no
; CHECK-NEXT: popq %rax
Correct dwarf unwind information in function epilogue This patch aims to provide correct dwarf unwind information in function epilogue for X86. It consists of two parts. The first part inserts CFI instructions that set appropriate cfa offset and cfa register in emitEpilogue() in X86FrameLowering. This part is X86 specific. The second part is platform independent and ensures that: * CFI instructions do not affect code generation (they are not counted as instructions when tail duplicating or tail merging) * Unwind information remains correct when a function is modified by different passes. This is done in a late pass by analyzing information about cfa offset and cfa register in BBs and inserting additional CFI directives where necessary. Added CFIInstrInserter pass: * analyzes each basic block to determine cfa offset and register are valid at its entry and exit * verifies that outgoing cfa offset and register of predecessor blocks match incoming values of their successors * inserts additional CFI directives at basic block beginning to correct the rule for calculating CFA Having CFI instructions in function epilogue can cause incorrect CFA calculation rule for some basic blocks. This can happen if, due to basic block reordering, or the existence of multiple epilogue blocks, some of the blocks have wrong cfa offset and register values set by the epilogue block above them. CFIInstrInserter is currently run only on X86, but can be used by any target that implements support for adding CFI instructions in epilogue. Patch by Violeta Vukobrat. Differential Revision: https://reviews.llvm.org/D42848 llvm-svn: 330706
2018-04-24 18:32:08 +08:00
; CHECK-NEXT: .cfi_def_cfa_offset 8
[X86] Add test cases for opportunities for using BT instead of TEST under optsize. llvm-svn: 325277
2018-02-16 03:00:11 +08:00
; CHECK-NEXT: retq
%t = and i64 %x, 2048
%s = icmp eq i64 %t, 0
br i1 %s, label %yes, label %no
yes:
call void @bar()
ret void
no:
ret void
}
[X86] Only reorder srl/and on last DAG combiner run This seems to interfere with a target independent brcond combine that looks for the (srl (and X, C1), C2) pattern to enable TEST instructions. Once we flip, that combine doesn't fire and we end up exposing it to the X86 specific BT combine which causes us to emit a BT instruction. BT has lower throughput than TEST. We could try to make the brcond combine aware of the alternate pattern, but since the flip was just a code size reduction and not likely to enable other combines, it seemed easier to just delay it until after lowering. Differential Revision: https://reviews.llvm.org/D43201 llvm-svn: 325371
2018-02-17 02:51:09 +08:00
; This test is identical to test64 above with only the destination of the br
; reversed. This somehow causes the two functions to get slightly different
; initial IR. One has an extra invert of the setcc. This previous caused one
; the functions to use a BT while the other used a TEST due to another DAG
; combine messing with an expected canonical form.
[X86] Add test cases for opportunities for using BT instead of TEST under optsize. llvm-svn: 325277
2018-02-16 03:00:11 +08:00
define void @test64_2(i64 inreg %x) {
; CHECK-LABEL: test64_2:
; CHECK: # %bb.0:
; CHECK-NEXT: pushq %rax
; CHECK-NEXT: .cfi_def_cfa_offset 16
; CHECK-NEXT: testl $2048, %edi # imm = 0x800
; CHECK-NEXT: je .LBB2_2
; CHECK-NEXT: # %bb.1: # %yes
; CHECK-NEXT: callq bar
; CHECK-NEXT: .LBB2_2: # %no
; CHECK-NEXT: popq %rax
Correct dwarf unwind information in function epilogue This patch aims to provide correct dwarf unwind information in function epilogue for X86. It consists of two parts. The first part inserts CFI instructions that set appropriate cfa offset and cfa register in emitEpilogue() in X86FrameLowering. This part is X86 specific. The second part is platform independent and ensures that: * CFI instructions do not affect code generation (they are not counted as instructions when tail duplicating or tail merging) * Unwind information remains correct when a function is modified by different passes. This is done in a late pass by analyzing information about cfa offset and cfa register in BBs and inserting additional CFI directives where necessary. Added CFIInstrInserter pass: * analyzes each basic block to determine cfa offset and register are valid at its entry and exit * verifies that outgoing cfa offset and register of predecessor blocks match incoming values of their successors * inserts additional CFI directives at basic block beginning to correct the rule for calculating CFA Having CFI instructions in function epilogue can cause incorrect CFA calculation rule for some basic blocks. This can happen if, due to basic block reordering, or the existence of multiple epilogue blocks, some of the blocks have wrong cfa offset and register values set by the epilogue block above them. CFIInstrInserter is currently run only on X86, but can be used by any target that implements support for adding CFI instructions in epilogue. Patch by Violeta Vukobrat. Differential Revision: https://reviews.llvm.org/D42848 llvm-svn: 330706
2018-04-24 18:32:08 +08:00
; CHECK-NEXT: .cfi_def_cfa_offset 8
[X86] Add test cases for opportunities for using BT instead of TEST under optsize. llvm-svn: 325277
2018-02-16 03:00:11 +08:00
; CHECK-NEXT: retq
%t = and i64 %x, 2048
%s = icmp eq i64 %t, 0
br i1 %s, label %no, label %yes
yes:
call void @bar()
ret void
no:
ret void
}
define void @test64_optsize_2(i64 inreg %x) optsize {
; CHECK-LABEL: test64_optsize_2:
; CHECK: # %bb.0:
; CHECK-NEXT: pushq %rax
; CHECK-NEXT: .cfi_def_cfa_offset 16
[X86] Enable BT to be used in place of TEST for single bit checks under optsize We already do this for 64-bit when it won't fit into a 64-bit AND/TEST's immediate field. This adds an additional qualifier to do it for any single bit constant larger than 8-bits under optsize Differential Revision: https://reviews.llvm.org/D43346 llvm-svn: 325290
2018-02-16 04:27:30 +08:00
; CHECK-NEXT: btl $11, %edi
; CHECK-NEXT: jae .LBB3_2
[X86] Add test cases for opportunities for using BT instead of TEST under optsize. llvm-svn: 325277
2018-02-16 03:00:11 +08:00
; CHECK-NEXT: # %bb.1: # %yes
; CHECK-NEXT: callq bar
; CHECK-NEXT: .LBB3_2: # %no
; CHECK-NEXT: popq %rax
Correct dwarf unwind information in function epilogue This patch aims to provide correct dwarf unwind information in function epilogue for X86. It consists of two parts. The first part inserts CFI instructions that set appropriate cfa offset and cfa register in emitEpilogue() in X86FrameLowering. This part is X86 specific. The second part is platform independent and ensures that: * CFI instructions do not affect code generation (they are not counted as instructions when tail duplicating or tail merging) * Unwind information remains correct when a function is modified by different passes. This is done in a late pass by analyzing information about cfa offset and cfa register in BBs and inserting additional CFI directives where necessary. Added CFIInstrInserter pass: * analyzes each basic block to determine cfa offset and register are valid at its entry and exit * verifies that outgoing cfa offset and register of predecessor blocks match incoming values of their successors * inserts additional CFI directives at basic block beginning to correct the rule for calculating CFA Having CFI instructions in function epilogue can cause incorrect CFA calculation rule for some basic blocks. This can happen if, due to basic block reordering, or the existence of multiple epilogue blocks, some of the blocks have wrong cfa offset and register values set by the epilogue block above them. CFIInstrInserter is currently run only on X86, but can be used by any target that implements support for adding CFI instructions in epilogue. Patch by Violeta Vukobrat. Differential Revision: https://reviews.llvm.org/D42848 llvm-svn: 330706
2018-04-24 18:32:08 +08:00
; CHECK-NEXT: .cfi_def_cfa_offset 8
[X86] Add test cases for opportunities for using BT instead of TEST under optsize. llvm-svn: 325277
2018-02-16 03:00:11 +08:00
; CHECK-NEXT: retq
%t = and i64 %x, 2048
%s = icmp eq i64 %t, 0
br i1 %s, label %no, label %yes
yes:
call void @bar()
ret void
no:
ret void
}
define void @test64_3(i64 inreg %x) {
; CHECK-LABEL: test64_3:
; CHECK: # %bb.0:
; CHECK-NEXT: pushq %rax
; CHECK-NEXT: .cfi_def_cfa_offset 16
; CHECK-NEXT: btq $32, %rdi
; CHECK-NEXT: jb .LBB4_2
; CHECK-NEXT: # %bb.1: # %yes
; CHECK-NEXT: callq bar
; CHECK-NEXT: .LBB4_2: # %no
; CHECK-NEXT: popq %rax
Correct dwarf unwind information in function epilogue This patch aims to provide correct dwarf unwind information in function epilogue for X86. It consists of two parts. The first part inserts CFI instructions that set appropriate cfa offset and cfa register in emitEpilogue() in X86FrameLowering. This part is X86 specific. The second part is platform independent and ensures that: * CFI instructions do not affect code generation (they are not counted as instructions when tail duplicating or tail merging) * Unwind information remains correct when a function is modified by different passes. This is done in a late pass by analyzing information about cfa offset and cfa register in BBs and inserting additional CFI directives where necessary. Added CFIInstrInserter pass: * analyzes each basic block to determine cfa offset and register are valid at its entry and exit * verifies that outgoing cfa offset and register of predecessor blocks match incoming values of their successors * inserts additional CFI directives at basic block beginning to correct the rule for calculating CFA Having CFI instructions in function epilogue can cause incorrect CFA calculation rule for some basic blocks. This can happen if, due to basic block reordering, or the existence of multiple epilogue blocks, some of the blocks have wrong cfa offset and register values set by the epilogue block above them. CFIInstrInserter is currently run only on X86, but can be used by any target that implements support for adding CFI instructions in epilogue. Patch by Violeta Vukobrat. Differential Revision: https://reviews.llvm.org/D42848 llvm-svn: 330706
2018-04-24 18:32:08 +08:00
; CHECK-NEXT: .cfi_def_cfa_offset 8
[X86] Add test cases for opportunities for using BT instead of TEST under optsize. llvm-svn: 325277
2018-02-16 03:00:11 +08:00
; CHECK-NEXT: retq
%t = and i64 %x, 4294967296
%s = icmp eq i64 %t, 0
br i1 %s, label %yes, label %no
yes:
call void @bar()
ret void
no:
ret void
}
define void @test64_optsize_3(i64 inreg %x) optsize {
; CHECK-LABEL: test64_optsize_3:
; CHECK: # %bb.0:
; CHECK-NEXT: pushq %rax
; CHECK-NEXT: .cfi_def_cfa_offset 16
; CHECK-NEXT: btq $32, %rdi
; CHECK-NEXT: jb .LBB5_2
; CHECK-NEXT: # %bb.1: # %yes
; CHECK-NEXT: callq bar
; CHECK-NEXT: .LBB5_2: # %no
; CHECK-NEXT: popq %rax
Correct dwarf unwind information in function epilogue This patch aims to provide correct dwarf unwind information in function epilogue for X86. It consists of two parts. The first part inserts CFI instructions that set appropriate cfa offset and cfa register in emitEpilogue() in X86FrameLowering. This part is X86 specific. The second part is platform independent and ensures that: * CFI instructions do not affect code generation (they are not counted as instructions when tail duplicating or tail merging) * Unwind information remains correct when a function is modified by different passes. This is done in a late pass by analyzing information about cfa offset and cfa register in BBs and inserting additional CFI directives where necessary. Added CFIInstrInserter pass: * analyzes each basic block to determine cfa offset and register are valid at its entry and exit * verifies that outgoing cfa offset and register of predecessor blocks match incoming values of their successors * inserts additional CFI directives at basic block beginning to correct the rule for calculating CFA Having CFI instructions in function epilogue can cause incorrect CFA calculation rule for some basic blocks. This can happen if, due to basic block reordering, or the existence of multiple epilogue blocks, some of the blocks have wrong cfa offset and register values set by the epilogue block above them. CFIInstrInserter is currently run only on X86, but can be used by any target that implements support for adding CFI instructions in epilogue. Patch by Violeta Vukobrat. Differential Revision: https://reviews.llvm.org/D42848 llvm-svn: 330706
2018-04-24 18:32:08 +08:00
; CHECK-NEXT: .cfi_def_cfa_offset 8
[X86] Add test cases for opportunities for using BT instead of TEST under optsize. llvm-svn: 325277
2018-02-16 03:00:11 +08:00
; CHECK-NEXT: retq
%t = and i64 %x, 4294967296
%s = icmp eq i64 %t, 0
br i1 %s, label %yes, label %no
yes:
call void @bar()
ret void
no:
ret void
}
define void @test64_4(i64 inreg %x) {
; CHECK-LABEL: test64_4:
; CHECK: # %bb.0:
; CHECK-NEXT: pushq %rax
; CHECK-NEXT: .cfi_def_cfa_offset 16
; CHECK-NEXT: btq $32, %rdi
; CHECK-NEXT: jae .LBB6_2
; CHECK-NEXT: # %bb.1: # %yes
; CHECK-NEXT: callq bar
; CHECK-NEXT: .LBB6_2: # %no
; CHECK-NEXT: popq %rax
Correct dwarf unwind information in function epilogue This patch aims to provide correct dwarf unwind information in function epilogue for X86. It consists of two parts. The first part inserts CFI instructions that set appropriate cfa offset and cfa register in emitEpilogue() in X86FrameLowering. This part is X86 specific. The second part is platform independent and ensures that: * CFI instructions do not affect code generation (they are not counted as instructions when tail duplicating or tail merging) * Unwind information remains correct when a function is modified by different passes. This is done in a late pass by analyzing information about cfa offset and cfa register in BBs and inserting additional CFI directives where necessary. Added CFIInstrInserter pass: * analyzes each basic block to determine cfa offset and register are valid at its entry and exit * verifies that outgoing cfa offset and register of predecessor blocks match incoming values of their successors * inserts additional CFI directives at basic block beginning to correct the rule for calculating CFA Having CFI instructions in function epilogue can cause incorrect CFA calculation rule for some basic blocks. This can happen if, due to basic block reordering, or the existence of multiple epilogue blocks, some of the blocks have wrong cfa offset and register values set by the epilogue block above them. CFIInstrInserter is currently run only on X86, but can be used by any target that implements support for adding CFI instructions in epilogue. Patch by Violeta Vukobrat. Differential Revision: https://reviews.llvm.org/D42848 llvm-svn: 330706
2018-04-24 18:32:08 +08:00
; CHECK-NEXT: .cfi_def_cfa_offset 8
[X86] Add test cases for opportunities for using BT instead of TEST under optsize. llvm-svn: 325277
2018-02-16 03:00:11 +08:00
; CHECK-NEXT: retq
%t = and i64 %x, 4294967296
%s = icmp eq i64 %t, 0
br i1 %s, label %no, label %yes
yes:
call void @bar()
ret void
no:
ret void
}
define void @test64_optsize_4(i64 inreg %x) optsize {
; CHECK-LABEL: test64_optsize_4:
; CHECK: # %bb.0:
; CHECK-NEXT: pushq %rax
; CHECK-NEXT: .cfi_def_cfa_offset 16
; CHECK-NEXT: btq $32, %rdi
; CHECK-NEXT: jae .LBB7_2
; CHECK-NEXT: # %bb.1: # %yes
; CHECK-NEXT: callq bar
; CHECK-NEXT: .LBB7_2: # %no
; CHECK-NEXT: popq %rax
Correct dwarf unwind information in function epilogue This patch aims to provide correct dwarf unwind information in function epilogue for X86. It consists of two parts. The first part inserts CFI instructions that set appropriate cfa offset and cfa register in emitEpilogue() in X86FrameLowering. This part is X86 specific. The second part is platform independent and ensures that: * CFI instructions do not affect code generation (they are not counted as instructions when tail duplicating or tail merging) * Unwind information remains correct when a function is modified by different passes. This is done in a late pass by analyzing information about cfa offset and cfa register in BBs and inserting additional CFI directives where necessary. Added CFIInstrInserter pass: * analyzes each basic block to determine cfa offset and register are valid at its entry and exit * verifies that outgoing cfa offset and register of predecessor blocks match incoming values of their successors * inserts additional CFI directives at basic block beginning to correct the rule for calculating CFA Having CFI instructions in function epilogue can cause incorrect CFA calculation rule for some basic blocks. This can happen if, due to basic block reordering, or the existence of multiple epilogue blocks, some of the blocks have wrong cfa offset and register values set by the epilogue block above them. CFIInstrInserter is currently run only on X86, but can be used by any target that implements support for adding CFI instructions in epilogue. Patch by Violeta Vukobrat. Differential Revision: https://reviews.llvm.org/D42848 llvm-svn: 330706
2018-04-24 18:32:08 +08:00
; CHECK-NEXT: .cfi_def_cfa_offset 8
[X86] Add test cases for opportunities for using BT instead of TEST under optsize. llvm-svn: 325277
2018-02-16 03:00:11 +08:00
; CHECK-NEXT: retq
%t = and i64 %x, 4294967296
%s = icmp eq i64 %t, 0
br i1 %s, label %no, label %yes
yes:
call void @bar()
ret void
no:
ret void
}
define void @test32(i32 inreg %x) {
; CHECK-LABEL: test32:
; CHECK: # %bb.0:
; CHECK-NEXT: pushq %rax
; CHECK-NEXT: .cfi_def_cfa_offset 16
[X86] Only reorder srl/and on last DAG combiner run This seems to interfere with a target independent brcond combine that looks for the (srl (and X, C1), C2) pattern to enable TEST instructions. Once we flip, that combine doesn't fire and we end up exposing it to the X86 specific BT combine which causes us to emit a BT instruction. BT has lower throughput than TEST. We could try to make the brcond combine aware of the alternate pattern, but since the flip was just a code size reduction and not likely to enable other combines, it seemed easier to just delay it until after lowering. Differential Revision: https://reviews.llvm.org/D43201 llvm-svn: 325371
2018-02-17 02:51:09 +08:00
; CHECK-NEXT: testl $2048, %edi # imm = 0x800
; CHECK-NEXT: jne .LBB8_2
[X86] Add test cases for opportunities for using BT instead of TEST under optsize. llvm-svn: 325277
2018-02-16 03:00:11 +08:00
; CHECK-NEXT: # %bb.1: # %yes
; CHECK-NEXT: callq bar
; CHECK-NEXT: .LBB8_2: # %no
; CHECK-NEXT: popq %rax
Correct dwarf unwind information in function epilogue This patch aims to provide correct dwarf unwind information in function epilogue for X86. It consists of two parts. The first part inserts CFI instructions that set appropriate cfa offset and cfa register in emitEpilogue() in X86FrameLowering. This part is X86 specific. The second part is platform independent and ensures that: * CFI instructions do not affect code generation (they are not counted as instructions when tail duplicating or tail merging) * Unwind information remains correct when a function is modified by different passes. This is done in a late pass by analyzing information about cfa offset and cfa register in BBs and inserting additional CFI directives where necessary. Added CFIInstrInserter pass: * analyzes each basic block to determine cfa offset and register are valid at its entry and exit * verifies that outgoing cfa offset and register of predecessor blocks match incoming values of their successors * inserts additional CFI directives at basic block beginning to correct the rule for calculating CFA Having CFI instructions in function epilogue can cause incorrect CFA calculation rule for some basic blocks. This can happen if, due to basic block reordering, or the existence of multiple epilogue blocks, some of the blocks have wrong cfa offset and register values set by the epilogue block above them. CFIInstrInserter is currently run only on X86, but can be used by any target that implements support for adding CFI instructions in epilogue. Patch by Violeta Vukobrat. Differential Revision: https://reviews.llvm.org/D42848 llvm-svn: 330706
2018-04-24 18:32:08 +08:00
; CHECK-NEXT: .cfi_def_cfa_offset 8
[X86] Add test cases for opportunities for using BT instead of TEST under optsize. llvm-svn: 325277
2018-02-16 03:00:11 +08:00
; CHECK-NEXT: retq
%t = and i32 %x, 2048
%s = icmp eq i32 %t, 0
br i1 %s, label %yes, label %no
yes:
call void @bar()
ret void
no:
ret void
}
define void @test32_optsize(i32 inreg %x) optsize {
; CHECK-LABEL: test32_optsize:
; CHECK: # %bb.0:
; CHECK-NEXT: pushq %rax
; CHECK-NEXT: .cfi_def_cfa_offset 16
; CHECK-NEXT: btl $11, %edi
; CHECK-NEXT: jb .LBB9_2
; CHECK-NEXT: # %bb.1: # %yes
; CHECK-NEXT: callq bar
; CHECK-NEXT: .LBB9_2: # %no
; CHECK-NEXT: popq %rax
Correct dwarf unwind information in function epilogue This patch aims to provide correct dwarf unwind information in function epilogue for X86. It consists of two parts. The first part inserts CFI instructions that set appropriate cfa offset and cfa register in emitEpilogue() in X86FrameLowering. This part is X86 specific. The second part is platform independent and ensures that: * CFI instructions do not affect code generation (they are not counted as instructions when tail duplicating or tail merging) * Unwind information remains correct when a function is modified by different passes. This is done in a late pass by analyzing information about cfa offset and cfa register in BBs and inserting additional CFI directives where necessary. Added CFIInstrInserter pass: * analyzes each basic block to determine cfa offset and register are valid at its entry and exit * verifies that outgoing cfa offset and register of predecessor blocks match incoming values of their successors * inserts additional CFI directives at basic block beginning to correct the rule for calculating CFA Having CFI instructions in function epilogue can cause incorrect CFA calculation rule for some basic blocks. This can happen if, due to basic block reordering, or the existence of multiple epilogue blocks, some of the blocks have wrong cfa offset and register values set by the epilogue block above them. CFIInstrInserter is currently run only on X86, but can be used by any target that implements support for adding CFI instructions in epilogue. Patch by Violeta Vukobrat. Differential Revision: https://reviews.llvm.org/D42848 llvm-svn: 330706
2018-04-24 18:32:08 +08:00
; CHECK-NEXT: .cfi_def_cfa_offset 8
[X86] Add test cases for opportunities for using BT instead of TEST under optsize. llvm-svn: 325277
2018-02-16 03:00:11 +08:00
; CHECK-NEXT: retq
%t = and i32 %x, 2048
%s = icmp eq i32 %t, 0
br i1 %s, label %yes, label %no
yes:
call void @bar()
ret void
no:
ret void
}
define void @test32_2(i32 inreg %x) {
; CHECK-LABEL: test32_2:
; CHECK: # %bb.0:
; CHECK-NEXT: pushq %rax
; CHECK-NEXT: .cfi_def_cfa_offset 16
; CHECK-NEXT: testl $2048, %edi # imm = 0x800
; CHECK-NEXT: je .LBB10_2
; CHECK-NEXT: # %bb.1: # %yes
; CHECK-NEXT: callq bar
; CHECK-NEXT: .LBB10_2: # %no
; CHECK-NEXT: popq %rax
Correct dwarf unwind information in function epilogue This patch aims to provide correct dwarf unwind information in function epilogue for X86. It consists of two parts. The first part inserts CFI instructions that set appropriate cfa offset and cfa register in emitEpilogue() in X86FrameLowering. This part is X86 specific. The second part is platform independent and ensures that: * CFI instructions do not affect code generation (they are not counted as instructions when tail duplicating or tail merging) * Unwind information remains correct when a function is modified by different passes. This is done in a late pass by analyzing information about cfa offset and cfa register in BBs and inserting additional CFI directives where necessary. Added CFIInstrInserter pass: * analyzes each basic block to determine cfa offset and register are valid at its entry and exit * verifies that outgoing cfa offset and register of predecessor blocks match incoming values of their successors * inserts additional CFI directives at basic block beginning to correct the rule for calculating CFA Having CFI instructions in function epilogue can cause incorrect CFA calculation rule for some basic blocks. This can happen if, due to basic block reordering, or the existence of multiple epilogue blocks, some of the blocks have wrong cfa offset and register values set by the epilogue block above them. CFIInstrInserter is currently run only on X86, but can be used by any target that implements support for adding CFI instructions in epilogue. Patch by Violeta Vukobrat. Differential Revision: https://reviews.llvm.org/D42848 llvm-svn: 330706
2018-04-24 18:32:08 +08:00
; CHECK-NEXT: .cfi_def_cfa_offset 8
[X86] Add test cases for opportunities for using BT instead of TEST under optsize. llvm-svn: 325277
2018-02-16 03:00:11 +08:00
; CHECK-NEXT: retq
%t = and i32 %x, 2048
%s = icmp eq i32 %t, 0
br i1 %s, label %no, label %yes
yes:
call void @bar()
ret void
no:
ret void
}
define void @test32_optsize_2(i32 inreg %x) optsize {
; CHECK-LABEL: test32_optsize_2:
; CHECK: # %bb.0:
; CHECK-NEXT: pushq %rax
; CHECK-NEXT: .cfi_def_cfa_offset 16
[X86] Enable BT to be used in place of TEST for single bit checks under optsize We already do this for 64-bit when it won't fit into a 64-bit AND/TEST's immediate field. This adds an additional qualifier to do it for any single bit constant larger than 8-bits under optsize Differential Revision: https://reviews.llvm.org/D43346 llvm-svn: 325290
2018-02-16 04:27:30 +08:00
; CHECK-NEXT: btl $11, %edi
; CHECK-NEXT: jae .LBB11_2
[X86] Add test cases for opportunities for using BT instead of TEST under optsize. llvm-svn: 325277
2018-02-16 03:00:11 +08:00
; CHECK-NEXT: # %bb.1: # %yes
; CHECK-NEXT: callq bar
; CHECK-NEXT: .LBB11_2: # %no
; CHECK-NEXT: popq %rax
Correct dwarf unwind information in function epilogue This patch aims to provide correct dwarf unwind information in function epilogue for X86. It consists of two parts. The first part inserts CFI instructions that set appropriate cfa offset and cfa register in emitEpilogue() in X86FrameLowering. This part is X86 specific. The second part is platform independent and ensures that: * CFI instructions do not affect code generation (they are not counted as instructions when tail duplicating or tail merging) * Unwind information remains correct when a function is modified by different passes. This is done in a late pass by analyzing information about cfa offset and cfa register in BBs and inserting additional CFI directives where necessary. Added CFIInstrInserter pass: * analyzes each basic block to determine cfa offset and register are valid at its entry and exit * verifies that outgoing cfa offset and register of predecessor blocks match incoming values of their successors * inserts additional CFI directives at basic block beginning to correct the rule for calculating CFA Having CFI instructions in function epilogue can cause incorrect CFA calculation rule for some basic blocks. This can happen if, due to basic block reordering, or the existence of multiple epilogue blocks, some of the blocks have wrong cfa offset and register values set by the epilogue block above them. CFIInstrInserter is currently run only on X86, but can be used by any target that implements support for adding CFI instructions in epilogue. Patch by Violeta Vukobrat. Differential Revision: https://reviews.llvm.org/D42848 llvm-svn: 330706
2018-04-24 18:32:08 +08:00
; CHECK-NEXT: .cfi_def_cfa_offset 8
[X86] Add test cases for opportunities for using BT instead of TEST under optsize. llvm-svn: 325277
2018-02-16 03:00:11 +08:00
; CHECK-NEXT: retq
%t = and i32 %x, 2048
%s = icmp eq i32 %t, 0
br i1 %s, label %no, label %yes
yes:
call void @bar()
ret void
no:
ret void
}
define void @test16(i16 inreg %x) {
; CHECK-LABEL: test16:
; CHECK: # %bb.0:
; CHECK-NEXT: pushq %rax
; CHECK-NEXT: .cfi_def_cfa_offset 16
[X86] Only reorder srl/and on last DAG combiner run This seems to interfere with a target independent brcond combine that looks for the (srl (and X, C1), C2) pattern to enable TEST instructions. Once we flip, that combine doesn't fire and we end up exposing it to the X86 specific BT combine which causes us to emit a BT instruction. BT has lower throughput than TEST. We could try to make the brcond combine aware of the alternate pattern, but since the flip was just a code size reduction and not likely to enable other combines, it seemed easier to just delay it until after lowering. Differential Revision: https://reviews.llvm.org/D43201 llvm-svn: 325371
2018-02-17 02:51:09 +08:00
; CHECK-NEXT: testl $2048, %edi # imm = 0x800
; CHECK-NEXT: jne .LBB12_2
[X86] Add test cases for opportunities for using BT instead of TEST under optsize. llvm-svn: 325277
2018-02-16 03:00:11 +08:00
; CHECK-NEXT: # %bb.1: # %yes
; CHECK-NEXT: callq bar
; CHECK-NEXT: .LBB12_2: # %no
; CHECK-NEXT: popq %rax
Correct dwarf unwind information in function epilogue This patch aims to provide correct dwarf unwind information in function epilogue for X86. It consists of two parts. The first part inserts CFI instructions that set appropriate cfa offset and cfa register in emitEpilogue() in X86FrameLowering. This part is X86 specific. The second part is platform independent and ensures that: * CFI instructions do not affect code generation (they are not counted as instructions when tail duplicating or tail merging) * Unwind information remains correct when a function is modified by different passes. This is done in a late pass by analyzing information about cfa offset and cfa register in BBs and inserting additional CFI directives where necessary. Added CFIInstrInserter pass: * analyzes each basic block to determine cfa offset and register are valid at its entry and exit * verifies that outgoing cfa offset and register of predecessor blocks match incoming values of their successors * inserts additional CFI directives at basic block beginning to correct the rule for calculating CFA Having CFI instructions in function epilogue can cause incorrect CFA calculation rule for some basic blocks. This can happen if, due to basic block reordering, or the existence of multiple epilogue blocks, some of the blocks have wrong cfa offset and register values set by the epilogue block above them. CFIInstrInserter is currently run only on X86, but can be used by any target that implements support for adding CFI instructions in epilogue. Patch by Violeta Vukobrat. Differential Revision: https://reviews.llvm.org/D42848 llvm-svn: 330706
2018-04-24 18:32:08 +08:00
; CHECK-NEXT: .cfi_def_cfa_offset 8
[X86] Add test cases for opportunities for using BT instead of TEST under optsize. llvm-svn: 325277
2018-02-16 03:00:11 +08:00
; CHECK-NEXT: retq
%t = and i16 %x, 2048
%s = icmp eq i16 %t, 0
br i1 %s, label %yes, label %no
yes:
call void @bar()
ret void
no:
ret void
}
define void @test16_optsize(i16 inreg %x) optsize {
; CHECK-LABEL: test16_optsize:
; CHECK: # %bb.0:
; CHECK-NEXT: pushq %rax
; CHECK-NEXT: .cfi_def_cfa_offset 16
; CHECK-NEXT: btl $11, %edi
; CHECK-NEXT: jb .LBB13_2
; CHECK-NEXT: # %bb.1: # %yes
; CHECK-NEXT: callq bar
; CHECK-NEXT: .LBB13_2: # %no
; CHECK-NEXT: popq %rax
Correct dwarf unwind information in function epilogue This patch aims to provide correct dwarf unwind information in function epilogue for X86. It consists of two parts. The first part inserts CFI instructions that set appropriate cfa offset and cfa register in emitEpilogue() in X86FrameLowering. This part is X86 specific. The second part is platform independent and ensures that: * CFI instructions do not affect code generation (they are not counted as instructions when tail duplicating or tail merging) * Unwind information remains correct when a function is modified by different passes. This is done in a late pass by analyzing information about cfa offset and cfa register in BBs and inserting additional CFI directives where necessary. Added CFIInstrInserter pass: * analyzes each basic block to determine cfa offset and register are valid at its entry and exit * verifies that outgoing cfa offset and register of predecessor blocks match incoming values of their successors * inserts additional CFI directives at basic block beginning to correct the rule for calculating CFA Having CFI instructions in function epilogue can cause incorrect CFA calculation rule for some basic blocks. This can happen if, due to basic block reordering, or the existence of multiple epilogue blocks, some of the blocks have wrong cfa offset and register values set by the epilogue block above them. CFIInstrInserter is currently run only on X86, but can be used by any target that implements support for adding CFI instructions in epilogue. Patch by Violeta Vukobrat. Differential Revision: https://reviews.llvm.org/D42848 llvm-svn: 330706
2018-04-24 18:32:08 +08:00
; CHECK-NEXT: .cfi_def_cfa_offset 8
[X86] Add test cases for opportunities for using BT instead of TEST under optsize. llvm-svn: 325277
2018-02-16 03:00:11 +08:00
; CHECK-NEXT: retq
%t = and i16 %x, 2048
%s = icmp eq i16 %t, 0
br i1 %s, label %yes, label %no
yes:
call void @bar()
ret void
no:
ret void
}
define void @test16_2(i16 inreg %x) {
; CHECK-LABEL: test16_2:
; CHECK: # %bb.0:
; CHECK-NEXT: pushq %rax
; CHECK-NEXT: .cfi_def_cfa_offset 16
; CHECK-NEXT: testl $2048, %edi # imm = 0x800
; CHECK-NEXT: je .LBB14_2
; CHECK-NEXT: # %bb.1: # %yes
; CHECK-NEXT: callq bar
; CHECK-NEXT: .LBB14_2: # %no
; CHECK-NEXT: popq %rax
Correct dwarf unwind information in function epilogue This patch aims to provide correct dwarf unwind information in function epilogue for X86. It consists of two parts. The first part inserts CFI instructions that set appropriate cfa offset and cfa register in emitEpilogue() in X86FrameLowering. This part is X86 specific. The second part is platform independent and ensures that: * CFI instructions do not affect code generation (they are not counted as instructions when tail duplicating or tail merging) * Unwind information remains correct when a function is modified by different passes. This is done in a late pass by analyzing information about cfa offset and cfa register in BBs and inserting additional CFI directives where necessary. Added CFIInstrInserter pass: * analyzes each basic block to determine cfa offset and register are valid at its entry and exit * verifies that outgoing cfa offset and register of predecessor blocks match incoming values of their successors * inserts additional CFI directives at basic block beginning to correct the rule for calculating CFA Having CFI instructions in function epilogue can cause incorrect CFA calculation rule for some basic blocks. This can happen if, due to basic block reordering, or the existence of multiple epilogue blocks, some of the blocks have wrong cfa offset and register values set by the epilogue block above them. CFIInstrInserter is currently run only on X86, but can be used by any target that implements support for adding CFI instructions in epilogue. Patch by Violeta Vukobrat. Differential Revision: https://reviews.llvm.org/D42848 llvm-svn: 330706
2018-04-24 18:32:08 +08:00
; CHECK-NEXT: .cfi_def_cfa_offset 8
[X86] Add test cases for opportunities for using BT instead of TEST under optsize. llvm-svn: 325277
2018-02-16 03:00:11 +08:00
; CHECK-NEXT: retq
%t = and i16 %x, 2048
%s = icmp eq i16 %t, 0
br i1 %s, label %no, label %yes
yes:
call void @bar()
ret void
no:
ret void
}
define void @test16_optsize_2(i16 inreg %x) optsize {
; CHECK-LABEL: test16_optsize_2:
; CHECK: # %bb.0:
; CHECK-NEXT: pushq %rax
; CHECK-NEXT: .cfi_def_cfa_offset 16
[X86] Enable BT to be used in place of TEST for single bit checks under optsize We already do this for 64-bit when it won't fit into a 64-bit AND/TEST's immediate field. This adds an additional qualifier to do it for any single bit constant larger than 8-bits under optsize Differential Revision: https://reviews.llvm.org/D43346 llvm-svn: 325290
2018-02-16 04:27:30 +08:00
; CHECK-NEXT: btl $11, %edi
; CHECK-NEXT: jae .LBB15_2
[X86] Add test cases for opportunities for using BT instead of TEST under optsize. llvm-svn: 325277
2018-02-16 03:00:11 +08:00
; CHECK-NEXT: # %bb.1: # %yes
; CHECK-NEXT: callq bar
; CHECK-NEXT: .LBB15_2: # %no
; CHECK-NEXT: popq %rax
Correct dwarf unwind information in function epilogue This patch aims to provide correct dwarf unwind information in function epilogue for X86. It consists of two parts. The first part inserts CFI instructions that set appropriate cfa offset and cfa register in emitEpilogue() in X86FrameLowering. This part is X86 specific. The second part is platform independent and ensures that: * CFI instructions do not affect code generation (they are not counted as instructions when tail duplicating or tail merging) * Unwind information remains correct when a function is modified by different passes. This is done in a late pass by analyzing information about cfa offset and cfa register in BBs and inserting additional CFI directives where necessary. Added CFIInstrInserter pass: * analyzes each basic block to determine cfa offset and register are valid at its entry and exit * verifies that outgoing cfa offset and register of predecessor blocks match incoming values of their successors * inserts additional CFI directives at basic block beginning to correct the rule for calculating CFA Having CFI instructions in function epilogue can cause incorrect CFA calculation rule for some basic blocks. This can happen if, due to basic block reordering, or the existence of multiple epilogue blocks, some of the blocks have wrong cfa offset and register values set by the epilogue block above them. CFIInstrInserter is currently run only on X86, but can be used by any target that implements support for adding CFI instructions in epilogue. Patch by Violeta Vukobrat. Differential Revision: https://reviews.llvm.org/D42848 llvm-svn: 330706
2018-04-24 18:32:08 +08:00
; CHECK-NEXT: .cfi_def_cfa_offset 8
[X86] Add test cases for opportunities for using BT instead of TEST under optsize. llvm-svn: 325277
2018-02-16 03:00:11 +08:00
; CHECK-NEXT: retq
%t = and i16 %x, 2048
%s = icmp eq i16 %t, 0
br i1 %s, label %no, label %yes
yes:
call void @bar()
ret void
no:
ret void
}
declare void @bar()