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/push-cfi.ll

Ignoring revisions in .git-blame-ignore-revs. Click here to bypass and see the normal blame view.

293 lines
8.1 KiB
LLVM
Raw Normal View History

[X86] Generate .cfi_adjust_cfa_offset correctly when pushing arguments When push instructions are being used to pass function arguments on the stack, and either EH or debugging are enabled, we need to generate .cfi_adjust_cfa_offset directives appropriately. For (synch) EH, it is enough for the CFA offset to be correct at every call site, while for debugging we want to be correct after every push. Darwin does not support this well, so don't use pushes whenever it would be required. Differential Revision: http://reviews.llvm.org/D13767 llvm-svn: 251904
2015-11-03 16:17:25 +08:00
; RUN: llc < %s -mtriple=i686-pc-linux | FileCheck %s -check-prefix=LINUX -check-prefix=CHECK
; RUN: llc < %s -mtriple=i686-apple-darwin | FileCheck %s -check-prefix=DARWIN -check-prefix=CHECK
[X86] Emit .cfi_escape GNU_ARGS_SIZE when adjusting the stack before calls When outgoing function arguments are passed using push instructions, and EH is enabled, we may need to indicate to the stack unwinder that the stack pointer was adjusted before the call. This should fix the exception handling issues in PR24792. Differential Revision: http://reviews.llvm.org/D13132 llvm-svn: 249522
2015-10-07 15:01:31 +08:00
declare i32 @__gxx_personality_v0(...)
declare void @good(i32 %a, i32 %b, i32 %c, i32 %d)
declare void @large(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e, i32 %f)
declare void @empty()
[X86] Always generate precise CFA adjustments. This removes the code path that generate "synchronous" (only correct at call site) CFA. We will probably want to re-introduce it once we are capable of emitting different .eh_frame and .debug_frame sections. Differential Revision: http://reviews.llvm.org/D14948 llvm-svn: 254874
2015-12-06 21:06:20 +08:00
; When we use an invoke, we expect a .cfi_escape GNU_ARGS_SIZE
; with size 16 before the invocation. Without FP, we also expect
; .cfi_adjust_cfa_offset after each push.
; Darwin should not generate pushes in either circumstance.
[X86] Generate .cfi_adjust_cfa_offset correctly when pushing arguments When push instructions are being used to pass function arguments on the stack, and either EH or debugging are enabled, we need to generate .cfi_adjust_cfa_offset directives appropriately. For (synch) EH, it is enough for the CFA offset to be correct at every call site, while for debugging we want to be correct after every push. Darwin does not support this well, so don't use pushes whenever it would be required. Differential Revision: http://reviews.llvm.org/D13767 llvm-svn: 251904
2015-11-03 16:17:25 +08:00
; CHECK-LABEL: test1_nofp:
; LINUX: .cfi_escape 0x2e, 0x10
; LINUX-NEXT: pushl $4
[X86] Always generate precise CFA adjustments. This removes the code path that generate "synchronous" (only correct at call site) CFA. We will probably want to re-introduce it once we are capable of emitting different .eh_frame and .debug_frame sections. Differential Revision: http://reviews.llvm.org/D14948 llvm-svn: 254874
2015-12-06 21:06:20 +08:00
; LINUX-NEXT: .cfi_adjust_cfa_offset 4
[X86] Generate .cfi_adjust_cfa_offset correctly when pushing arguments When push instructions are being used to pass function arguments on the stack, and either EH or debugging are enabled, we need to generate .cfi_adjust_cfa_offset directives appropriately. For (synch) EH, it is enough for the CFA offset to be correct at every call site, while for debugging we want to be correct after every push. Darwin does not support this well, so don't use pushes whenever it would be required. Differential Revision: http://reviews.llvm.org/D13767 llvm-svn: 251904
2015-11-03 16:17:25 +08:00
; LINUX-NEXT: pushl $3
[X86] Always generate precise CFA adjustments. This removes the code path that generate "synchronous" (only correct at call site) CFA. We will probably want to re-introduce it once we are capable of emitting different .eh_frame and .debug_frame sections. Differential Revision: http://reviews.llvm.org/D14948 llvm-svn: 254874
2015-12-06 21:06:20 +08:00
; LINUX-NEXT: .cfi_adjust_cfa_offset 4
[X86] Generate .cfi_adjust_cfa_offset correctly when pushing arguments When push instructions are being used to pass function arguments on the stack, and either EH or debugging are enabled, we need to generate .cfi_adjust_cfa_offset directives appropriately. For (synch) EH, it is enough for the CFA offset to be correct at every call site, while for debugging we want to be correct after every push. Darwin does not support this well, so don't use pushes whenever it would be required. Differential Revision: http://reviews.llvm.org/D13767 llvm-svn: 251904
2015-11-03 16:17:25 +08:00
; LINUX-NEXT: pushl $2
[X86] Always generate precise CFA adjustments. This removes the code path that generate "synchronous" (only correct at call site) CFA. We will probably want to re-introduce it once we are capable of emitting different .eh_frame and .debug_frame sections. Differential Revision: http://reviews.llvm.org/D14948 llvm-svn: 254874
2015-12-06 21:06:20 +08:00
; LINUX-NEXT: .cfi_adjust_cfa_offset 4
[X86] Generate .cfi_adjust_cfa_offset correctly when pushing arguments When push instructions are being used to pass function arguments on the stack, and either EH or debugging are enabled, we need to generate .cfi_adjust_cfa_offset directives appropriately. For (synch) EH, it is enough for the CFA offset to be correct at every call site, while for debugging we want to be correct after every push. Darwin does not support this well, so don't use pushes whenever it would be required. Differential Revision: http://reviews.llvm.org/D13767 llvm-svn: 251904
2015-11-03 16:17:25 +08:00
; LINUX-NEXT: pushl $1
[X86] Always generate precise CFA adjustments. This removes the code path that generate "synchronous" (only correct at call site) CFA. We will probably want to re-introduce it once we are capable of emitting different .eh_frame and .debug_frame sections. Differential Revision: http://reviews.llvm.org/D14948 llvm-svn: 254874
2015-12-06 21:06:20 +08:00
; LINUX-NEXT: .cfi_adjust_cfa_offset 4
[X86] Generate .cfi_adjust_cfa_offset correctly when pushing arguments When push instructions are being used to pass function arguments on the stack, and either EH or debugging are enabled, we need to generate .cfi_adjust_cfa_offset directives appropriately. For (synch) EH, it is enough for the CFA offset to be correct at every call site, while for debugging we want to be correct after every push. Darwin does not support this well, so don't use pushes whenever it would be required. Differential Revision: http://reviews.llvm.org/D13767 llvm-svn: 251904
2015-11-03 16:17:25 +08:00
; LINUX-NEXT: call
; LINUX-NEXT: addl $16, %esp
; LINUX: .cfi_adjust_cfa_offset -16
; DARWIN-NOT: .cfi_escape
; DARWIN-NOT: pushl
define void @test1_nofp() #0 personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
entry:
invoke void @good(i32 1, i32 2, i32 3, i32 4)
to label %continue unwind label %cleanup
continue:
ret void
cleanup:
landingpad { i8*, i32 }
cleanup
ret void
}
; CHECK-LABEL: test1_fp:
; LINUX: .cfi_escape 0x2e, 0x10
; LINUX-NEXT: pushl $4
; LINUX-NEXT: pushl $3
; LINUX-NEXT: pushl $2
; LINUX-NEXT: pushl $1
; LINUX-NEXT: call
; LINUX-NEXT: addl $16, %esp
; DARWIN: pushl %ebp
; DARWIN-NOT: .cfi_escape
; DARWIN-NOT: pushl
define void @test1_fp() #1 personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
[X86] Emit .cfi_escape GNU_ARGS_SIZE when adjusting the stack before calls When outgoing function arguments are passed using push instructions, and EH is enabled, we may need to indicate to the stack unwinder that the stack pointer was adjusted before the call. This should fix the exception handling issues in PR24792. Differential Revision: http://reviews.llvm.org/D13132 llvm-svn: 249522
2015-10-07 15:01:31 +08:00
entry:
invoke void @good(i32 1, i32 2, i32 3, i32 4)
to label %continue unwind label %cleanup
continue:
ret void
cleanup:
landingpad { i8*, i32 }
cleanup
ret void
}
; If the function has no handlers, we don't need to generate GNU_ARGS_SIZE,
[X86] Generate .cfi_adjust_cfa_offset correctly when pushing arguments When push instructions are being used to pass function arguments on the stack, and either EH or debugging are enabled, we need to generate .cfi_adjust_cfa_offset directives appropriately. For (synch) EH, it is enough for the CFA offset to be correct at every call site, while for debugging we want to be correct after every push. Darwin does not support this well, so don't use pushes whenever it would be required. Differential Revision: http://reviews.llvm.org/D13767 llvm-svn: 251904
2015-11-03 16:17:25 +08:00
; even if it has an unwind table. Without FP, we still need cfi_adjust_cfa_offset,
; so darwin should not generate pushes.
; CHECK-LABEL: test2_nofp:
; LINUX-NOT: .cfi_escape
[X86] Always generate precise CFA adjustments. This removes the code path that generate "synchronous" (only correct at call site) CFA. We will probably want to re-introduce it once we are capable of emitting different .eh_frame and .debug_frame sections. Differential Revision: http://reviews.llvm.org/D14948 llvm-svn: 254874
2015-12-06 21:06:20 +08:00
; LINUX: pushl $4
; LINUX-NEXT: .cfi_adjust_cfa_offset 4
[X86] Generate .cfi_adjust_cfa_offset correctly when pushing arguments When push instructions are being used to pass function arguments on the stack, and either EH or debugging are enabled, we need to generate .cfi_adjust_cfa_offset directives appropriately. For (synch) EH, it is enough for the CFA offset to be correct at every call site, while for debugging we want to be correct after every push. Darwin does not support this well, so don't use pushes whenever it would be required. Differential Revision: http://reviews.llvm.org/D13767 llvm-svn: 251904
2015-11-03 16:17:25 +08:00
; LINUX-NEXT: pushl $3
[X86] Always generate precise CFA adjustments. This removes the code path that generate "synchronous" (only correct at call site) CFA. We will probably want to re-introduce it once we are capable of emitting different .eh_frame and .debug_frame sections. Differential Revision: http://reviews.llvm.org/D14948 llvm-svn: 254874
2015-12-06 21:06:20 +08:00
; LINUX-NEXT: .cfi_adjust_cfa_offset 4
[X86] Generate .cfi_adjust_cfa_offset correctly when pushing arguments When push instructions are being used to pass function arguments on the stack, and either EH or debugging are enabled, we need to generate .cfi_adjust_cfa_offset directives appropriately. For (synch) EH, it is enough for the CFA offset to be correct at every call site, while for debugging we want to be correct after every push. Darwin does not support this well, so don't use pushes whenever it would be required. Differential Revision: http://reviews.llvm.org/D13767 llvm-svn: 251904
2015-11-03 16:17:25 +08:00
; LINUX-NEXT: pushl $2
[X86] Always generate precise CFA adjustments. This removes the code path that generate "synchronous" (only correct at call site) CFA. We will probably want to re-introduce it once we are capable of emitting different .eh_frame and .debug_frame sections. Differential Revision: http://reviews.llvm.org/D14948 llvm-svn: 254874
2015-12-06 21:06:20 +08:00
; LINUX-NEXT: .cfi_adjust_cfa_offset 4
[X86] Generate .cfi_adjust_cfa_offset correctly when pushing arguments When push instructions are being used to pass function arguments on the stack, and either EH or debugging are enabled, we need to generate .cfi_adjust_cfa_offset directives appropriately. For (synch) EH, it is enough for the CFA offset to be correct at every call site, while for debugging we want to be correct after every push. Darwin does not support this well, so don't use pushes whenever it would be required. Differential Revision: http://reviews.llvm.org/D13767 llvm-svn: 251904
2015-11-03 16:17:25 +08:00
; LINUX-NEXT: pushl $1
[X86] Always generate precise CFA adjustments. This removes the code path that generate "synchronous" (only correct at call site) CFA. We will probably want to re-introduce it once we are capable of emitting different .eh_frame and .debug_frame sections. Differential Revision: http://reviews.llvm.org/D14948 llvm-svn: 254874
2015-12-06 21:06:20 +08:00
; LINUX-NEXT: .cfi_adjust_cfa_offset 4
[X86] Generate .cfi_adjust_cfa_offset correctly when pushing arguments When push instructions are being used to pass function arguments on the stack, and either EH or debugging are enabled, we need to generate .cfi_adjust_cfa_offset directives appropriately. For (synch) EH, it is enough for the CFA offset to be correct at every call site, while for debugging we want to be correct after every push. Darwin does not support this well, so don't use pushes whenever it would be required. Differential Revision: http://reviews.llvm.org/D13767 llvm-svn: 251904
2015-11-03 16:17:25 +08:00
; LINUX-NEXT: call
Revert "Correct dwarf unwind information in function epilogue for X86" This reverts r317579, originally committed as r317100. There is a design issue with marking CFI instructions duplicatable. Not all targets support the CFIInstrInserter pass, and targets like Darwin can't cope with duplicated prologue setup CFI instructions. The compact unwind info emission fails. When the following code is compiled for arm64 on Mac at -O3, the CFI instructions end up getting tail duplicated, which causes compact unwind info emission to fail: int a, c, d, e, f, g, h, i, j, k, l, m; void n(int o, int *b) { if (g) f = 0; for (; f < o; f++) { m = a; if (l > j * k > i) j = i = k = d; h = b[c] - e; } } We get assembly that looks like this: ; BB#1: ; %if.then Lloh3: adrp x9, _f@GOTPAGE Lloh4: ldr x9, [x9, _f@GOTPAGEOFF] mov w8, wzr Lloh5: str wzr, [x9] stp x20, x19, [sp, #-16]! ; 8-byte Folded Spill .cfi_def_cfa_offset 16 .cfi_offset w19, -8 .cfi_offset w20, -16 cmp w8, w0 b.lt LBB0_3 b LBB0_7 LBB0_2: ; %entry.if.end_crit_edge Lloh6: adrp x8, _f@GOTPAGE Lloh7: ldr x8, [x8, _f@GOTPAGEOFF] Lloh8: ldr w8, [x8] stp x20, x19, [sp, #-16]! ; 8-byte Folded Spill .cfi_def_cfa_offset 16 .cfi_offset w19, -8 .cfi_offset w20, -16 cmp w8, w0 b.ge LBB0_7 LBB0_3: ; %for.body.lr.ph Note the multiple .cfi_def* directives. Compact unwind info emission can't handle that. llvm-svn: 317726
2017-11-09 05:31:14 +08:00
; LINUX-NEXT: addl $28, %esp
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
; LINUX: .cfi_adjust_cfa_offset -28
[X86] Generate .cfi_adjust_cfa_offset correctly when pushing arguments When push instructions are being used to pass function arguments on the stack, and either EH or debugging are enabled, we need to generate .cfi_adjust_cfa_offset directives appropriately. For (synch) EH, it is enough for the CFA offset to be correct at every call site, while for debugging we want to be correct after every push. Darwin does not support this well, so don't use pushes whenever it would be required. Differential Revision: http://reviews.llvm.org/D13767 llvm-svn: 251904
2015-11-03 16:17:25 +08:00
; DARWIN-NOT: .cfi_escape
; DARWIN-NOT: pushl
define void @test2_nofp() #0 personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
entry:
call void @good(i32 1, i32 2, i32 3, i32 4)
ret void
}
; CHECK-LABEL: test2_fp:
[X86] Emit .cfi_escape GNU_ARGS_SIZE when adjusting the stack before calls When outgoing function arguments are passed using push instructions, and EH is enabled, we may need to indicate to the stack unwinder that the stack pointer was adjusted before the call. This should fix the exception handling issues in PR24792. Differential Revision: http://reviews.llvm.org/D13132 llvm-svn: 249522
2015-10-07 15:01:31 +08:00
; CHECK-NOT: .cfi_escape
[X86] Generate .cfi_adjust_cfa_offset correctly when pushing arguments When push instructions are being used to pass function arguments on the stack, and either EH or debugging are enabled, we need to generate .cfi_adjust_cfa_offset directives appropriately. For (synch) EH, it is enough for the CFA offset to be correct at every call site, while for debugging we want to be correct after every push. Darwin does not support this well, so don't use pushes whenever it would be required. Differential Revision: http://reviews.llvm.org/D13767 llvm-svn: 251904
2015-11-03 16:17:25 +08:00
; CHECK-NOT: .cfi_adjust_cfa_offset
[X86] Emit .cfi_escape GNU_ARGS_SIZE when adjusting the stack before calls When outgoing function arguments are passed using push instructions, and EH is enabled, we may need to indicate to the stack unwinder that the stack pointer was adjusted before the call. This should fix the exception handling issues in PR24792. Differential Revision: http://reviews.llvm.org/D13132 llvm-svn: 249522
2015-10-07 15:01:31 +08:00
; CHECK: pushl $4
; CHECK-NEXT: pushl $3
; CHECK-NEXT: pushl $2
; CHECK-NEXT: pushl $1
; CHECK-NEXT: call
[X86] Generate .cfi_adjust_cfa_offset correctly when pushing arguments When push instructions are being used to pass function arguments on the stack, and either EH or debugging are enabled, we need to generate .cfi_adjust_cfa_offset directives appropriately. For (synch) EH, it is enough for the CFA offset to be correct at every call site, while for debugging we want to be correct after every push. Darwin does not support this well, so don't use pushes whenever it would be required. Differential Revision: http://reviews.llvm.org/D13767 llvm-svn: 251904
2015-11-03 16:17:25 +08:00
; CHECK-NEXT: addl $24, %esp
define void @test2_fp() #1 personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
[X86] Emit .cfi_escape GNU_ARGS_SIZE when adjusting the stack before calls When outgoing function arguments are passed using push instructions, and EH is enabled, we may need to indicate to the stack unwinder that the stack pointer was adjusted before the call. This should fix the exception handling issues in PR24792. Differential Revision: http://reviews.llvm.org/D13132 llvm-svn: 249522
2015-10-07 15:01:31 +08:00
entry:
call void @good(i32 1, i32 2, i32 3, i32 4)
ret void
}
[X86] Generate .cfi_adjust_cfa_offset correctly when pushing arguments When push instructions are being used to pass function arguments on the stack, and either EH or debugging are enabled, we need to generate .cfi_adjust_cfa_offset directives appropriately. For (synch) EH, it is enough for the CFA offset to be correct at every call site, while for debugging we want to be correct after every push. Darwin does not support this well, so don't use pushes whenever it would be required. Differential Revision: http://reviews.llvm.org/D13767 llvm-svn: 251904
2015-11-03 16:17:25 +08:00
; If we did not end up using any pushes, no need for GNU_ARGS_SIZE or
; cfi_adjust_cfa_offset.
; CHECK-LABEL: test3_nofp:
; LINUX-NOT: .cfi_escape
; LINUX-NOT: .cfi_adjust_cfa_offset
; LINUX-NOT: pushl
; LINUX: retl
define void @test3_nofp() #0 personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
entry:
invoke void @empty()
to label %continue unwind label %cleanup
continue:
ret void
cleanup:
landingpad { i8*, i32 }
cleanup
ret void
}
; If we did not end up using any pushes, no need for GNU_ARGS_SIZE or
; cfi_adjust_cfa_offset.
; CHECK-LABEL: test3_fp:
; LINUX: pushl %ebp
; LINUX-NOT: .cfi_escape
; LINUX-NOT: .cfi_adjust_cfa_offset
; LINUX-NOT: pushl
; LINUX: retl
define void @test3_fp() #1 personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
[X86] Emit .cfi_escape GNU_ARGS_SIZE when adjusting the stack before calls When outgoing function arguments are passed using push instructions, and EH is enabled, we may need to indicate to the stack unwinder that the stack pointer was adjusted before the call. This should fix the exception handling issues in PR24792. Differential Revision: http://reviews.llvm.org/D13132 llvm-svn: 249522
2015-10-07 15:01:31 +08:00
entry:
invoke void @empty()
to label %continue unwind label %cleanup
continue:
ret void
cleanup:
landingpad { i8*, i32 }
cleanup
ret void
}
; Different sized stacks need different GNU_ARGS_SIZEs
; CHECK-LABEL: test4:
[X86] Generate .cfi_adjust_cfa_offset correctly when pushing arguments When push instructions are being used to pass function arguments on the stack, and either EH or debugging are enabled, we need to generate .cfi_adjust_cfa_offset directives appropriately. For (synch) EH, it is enough for the CFA offset to be correct at every call site, while for debugging we want to be correct after every push. Darwin does not support this well, so don't use pushes whenever it would be required. Differential Revision: http://reviews.llvm.org/D13767 llvm-svn: 251904
2015-11-03 16:17:25 +08:00
; LINUX: .cfi_escape 0x2e, 0x10
; LINUX-NEXT: pushl $4
; LINUX-NEXT: pushl $3
; LINUX-NEXT: pushl $2
; LINUX-NEXT: pushl $1
; LINUX-NEXT: call
; LINUX-NEXT: addl $16, %esp
; LINUX: .cfi_escape 0x2e, 0x20
; LINUX: subl $8, %esp
; LINUX-NEXT: pushl $11
; LINUX-NEXT: pushl $10
; LINUX-NEXT: pushl $9
; LINUX-NEXT: pushl $8
; LINUX-NEXT: pushl $7
; LINUX-NEXT: pushl $6
; LINUX-NEXT: calll large
; LINUX-NEXT: addl $32, %esp
define void @test4() #1 personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
[X86] Emit .cfi_escape GNU_ARGS_SIZE when adjusting the stack before calls When outgoing function arguments are passed using push instructions, and EH is enabled, we may need to indicate to the stack unwinder that the stack pointer was adjusted before the call. This should fix the exception handling issues in PR24792. Differential Revision: http://reviews.llvm.org/D13132 llvm-svn: 249522
2015-10-07 15:01:31 +08:00
entry:
invoke void @good(i32 1, i32 2, i32 3, i32 4)
to label %continue1 unwind label %cleanup
continue1:
invoke void @large(i32 6, i32 7, i32 8, i32 9, i32 10, i32 11)
to label %continue2 unwind label %cleanup
continue2:
ret void
cleanup:
landingpad { i8*, i32 }
cleanup
ret void
}
; If we did use pushes, we need to reset GNU_ARGS_SIZE before a call
[X86] Generate .cfi_adjust_cfa_offset correctly when pushing arguments When push instructions are being used to pass function arguments on the stack, and either EH or debugging are enabled, we need to generate .cfi_adjust_cfa_offset directives appropriately. For (synch) EH, it is enough for the CFA offset to be correct at every call site, while for debugging we want to be correct after every push. Darwin does not support this well, so don't use pushes whenever it would be required. Differential Revision: http://reviews.llvm.org/D13767 llvm-svn: 251904
2015-11-03 16:17:25 +08:00
; without parameters, but don't need to adjust the cfa offset
; CHECK-LABEL: test5_nofp:
; LINUX: .cfi_escape 0x2e, 0x10
; LINUX-NEXT: pushl $4
[X86] Always generate precise CFA adjustments. This removes the code path that generate "synchronous" (only correct at call site) CFA. We will probably want to re-introduce it once we are capable of emitting different .eh_frame and .debug_frame sections. Differential Revision: http://reviews.llvm.org/D14948 llvm-svn: 254874
2015-12-06 21:06:20 +08:00
; LINUX-NEXT: .cfi_adjust_cfa_offset 4
[X86] Generate .cfi_adjust_cfa_offset correctly when pushing arguments When push instructions are being used to pass function arguments on the stack, and either EH or debugging are enabled, we need to generate .cfi_adjust_cfa_offset directives appropriately. For (synch) EH, it is enough for the CFA offset to be correct at every call site, while for debugging we want to be correct after every push. Darwin does not support this well, so don't use pushes whenever it would be required. Differential Revision: http://reviews.llvm.org/D13767 llvm-svn: 251904
2015-11-03 16:17:25 +08:00
; LINUX-NEXT: pushl $3
[X86] Always generate precise CFA adjustments. This removes the code path that generate "synchronous" (only correct at call site) CFA. We will probably want to re-introduce it once we are capable of emitting different .eh_frame and .debug_frame sections. Differential Revision: http://reviews.llvm.org/D14948 llvm-svn: 254874
2015-12-06 21:06:20 +08:00
; LINUX-NEXT: .cfi_adjust_cfa_offset 4
[X86] Generate .cfi_adjust_cfa_offset correctly when pushing arguments When push instructions are being used to pass function arguments on the stack, and either EH or debugging are enabled, we need to generate .cfi_adjust_cfa_offset directives appropriately. For (synch) EH, it is enough for the CFA offset to be correct at every call site, while for debugging we want to be correct after every push. Darwin does not support this well, so don't use pushes whenever it would be required. Differential Revision: http://reviews.llvm.org/D13767 llvm-svn: 251904
2015-11-03 16:17:25 +08:00
; LINUX-NEXT: pushl $2
[X86] Always generate precise CFA adjustments. This removes the code path that generate "synchronous" (only correct at call site) CFA. We will probably want to re-introduce it once we are capable of emitting different .eh_frame and .debug_frame sections. Differential Revision: http://reviews.llvm.org/D14948 llvm-svn: 254874
2015-12-06 21:06:20 +08:00
; LINUX-NEXT: .cfi_adjust_cfa_offset 4
[X86] Generate .cfi_adjust_cfa_offset correctly when pushing arguments When push instructions are being used to pass function arguments on the stack, and either EH or debugging are enabled, we need to generate .cfi_adjust_cfa_offset directives appropriately. For (synch) EH, it is enough for the CFA offset to be correct at every call site, while for debugging we want to be correct after every push. Darwin does not support this well, so don't use pushes whenever it would be required. Differential Revision: http://reviews.llvm.org/D13767 llvm-svn: 251904
2015-11-03 16:17:25 +08:00
; LINUX-NEXT: pushl $1
[X86] Always generate precise CFA adjustments. This removes the code path that generate "synchronous" (only correct at call site) CFA. We will probably want to re-introduce it once we are capable of emitting different .eh_frame and .debug_frame sections. Differential Revision: http://reviews.llvm.org/D14948 llvm-svn: 254874
2015-12-06 21:06:20 +08:00
; LINUX-NEXT: .cfi_adjust_cfa_offset 4
[X86] Generate .cfi_adjust_cfa_offset correctly when pushing arguments When push instructions are being used to pass function arguments on the stack, and either EH or debugging are enabled, we need to generate .cfi_adjust_cfa_offset directives appropriately. For (synch) EH, it is enough for the CFA offset to be correct at every call site, while for debugging we want to be correct after every push. Darwin does not support this well, so don't use pushes whenever it would be required. Differential Revision: http://reviews.llvm.org/D13767 llvm-svn: 251904
2015-11-03 16:17:25 +08:00
; LINUX-NEXT: call
; LINUX-NEXT: addl $16, %esp
; LINUX: .cfi_adjust_cfa_offset -16
; LINUX-NOT: .cfi_adjust_cfa_offset
; LINUX: .cfi_escape 0x2e, 0x00
; LINUX-NOT: .cfi_adjust_cfa_offset
; LINUX: call
define void @test5_nofp() #0 personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
entry:
invoke void @good(i32 1, i32 2, i32 3, i32 4)
to label %continue1 unwind label %cleanup
continue1:
invoke void @empty()
to label %continue2 unwind label %cleanup
continue2:
ret void
cleanup:
landingpad { i8*, i32 }
cleanup
ret void
}
; CHECK-LABEL: test5_fp:
; LINUX: .cfi_escape 0x2e, 0x10
; LINUX-NEXT: pushl $4
; LINUX-NEXT: pushl $3
; LINUX-NEXT: pushl $2
; LINUX-NEXT: pushl $1
; LINUX-NEXT: call
; LINUX-NEXT: addl $16, %esp
; LINUX: .cfi_escape 0x2e, 0x00
; LINUX-NOT: .cfi_adjust_cfa_offset
; LINUX: call
define void @test5_fp() #1 personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
[X86] Emit .cfi_escape GNU_ARGS_SIZE when adjusting the stack before calls When outgoing function arguments are passed using push instructions, and EH is enabled, we may need to indicate to the stack unwinder that the stack pointer was adjusted before the call. This should fix the exception handling issues in PR24792. Differential Revision: http://reviews.llvm.org/D13132 llvm-svn: 249522
2015-10-07 15:01:31 +08:00
entry:
invoke void @good(i32 1, i32 2, i32 3, i32 4)
to label %continue1 unwind label %cleanup
continue1:
invoke void @empty()
to label %continue2 unwind label %cleanup
continue2:
ret void
cleanup:
landingpad { i8*, i32 }
cleanup
ret void
}
[X86] Generate .cfi_adjust_cfa_offset correctly when pushing arguments When push instructions are being used to pass function arguments on the stack, and either EH or debugging are enabled, we need to generate .cfi_adjust_cfa_offset directives appropriately. For (synch) EH, it is enough for the CFA offset to be correct at every call site, while for debugging we want to be correct after every push. Darwin does not support this well, so don't use pushes whenever it would be required. Differential Revision: http://reviews.llvm.org/D13767 llvm-svn: 251904
2015-11-03 16:17:25 +08:00
; FIXME: This is actually inefficient - we don't need to repeat the .cfi_escape twice.
[X86] Emit .cfi_escape GNU_ARGS_SIZE when adjusting the stack before calls When outgoing function arguments are passed using push instructions, and EH is enabled, we may need to indicate to the stack unwinder that the stack pointer was adjusted before the call. This should fix the exception handling issues in PR24792. Differential Revision: http://reviews.llvm.org/D13132 llvm-svn: 249522
2015-10-07 15:01:31 +08:00
; CHECK-LABEL: test6:
[X86] Generate .cfi_adjust_cfa_offset correctly when pushing arguments When push instructions are being used to pass function arguments on the stack, and either EH or debugging are enabled, we need to generate .cfi_adjust_cfa_offset directives appropriately. For (synch) EH, it is enough for the CFA offset to be correct at every call site, while for debugging we want to be correct after every push. Darwin does not support this well, so don't use pushes whenever it would be required. Differential Revision: http://reviews.llvm.org/D13767 llvm-svn: 251904
2015-11-03 16:17:25 +08:00
; LINUX: .cfi_escape 0x2e, 0x10
; LINUX: call
; LINUX: .cfi_escape 0x2e, 0x10
; LINUX: call
define void @test6() #1 personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
[X86] Emit .cfi_escape GNU_ARGS_SIZE when adjusting the stack before calls When outgoing function arguments are passed using push instructions, and EH is enabled, we may need to indicate to the stack unwinder that the stack pointer was adjusted before the call. This should fix the exception handling issues in PR24792. Differential Revision: http://reviews.llvm.org/D13132 llvm-svn: 249522
2015-10-07 15:01:31 +08:00
entry:
invoke void @good(i32 1, i32 2, i32 3, i32 4)
to label %continue1 unwind label %cleanup
continue1:
invoke void @good(i32 5, i32 6, i32 7, i32 8)
to label %continue2 unwind label %cleanup
continue2:
ret void
cleanup:
landingpad { i8*, i32 }
cleanup
ret void
}
[X86] Generate .cfi_adjust_cfa_offset correctly when pushing arguments When push instructions are being used to pass function arguments on the stack, and either EH or debugging are enabled, we need to generate .cfi_adjust_cfa_offset directives appropriately. For (synch) EH, it is enough for the CFA offset to be correct at every call site, while for debugging we want to be correct after every push. Darwin does not support this well, so don't use pushes whenever it would be required. Differential Revision: http://reviews.llvm.org/D13767 llvm-svn: 251904
2015-11-03 16:17:25 +08:00
; Darwin should generate pushes in the presense of FP and an unwind table,
; but not FP and invoke.
; CHECK-LABEL: test7:
; DARWIN: pushl %ebp
; DARWIN: movl %esp, %ebp
; DARWIN: .cfi_def_cfa_register %ebp
; DARWIN-NOT: .cfi_adjust_cfa_offset
; DARWIN: pushl $4
; DARWIN-NEXT: pushl $3
; DARWIN-NEXT: pushl $2
; DARWIN-NEXT: pushl $1
; DARWIN-NEXT: call
define void @test7() #1 personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
entry:
call void @good(i32 1, i32 2, i32 3, i32 4)
ret void
}
; CHECK-LABEL: test8:
; DARWIN: pushl %ebp
; DARWIN: movl %esp, %ebp
; DARWIN-NOT: .cfi_adjust_cfa_offset
; DARWIN-NOT: pushl
define void @test8() #1 personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
entry:
invoke void @good(i32 1, i32 2, i32 3, i32 4)
to label %continue unwind label %cleanup
continue:
ret void
cleanup:
landingpad { i8*, i32 }
cleanup
ret void
}
attributes #0 = { optsize }
Migrate function attribute "no-frame-pointer-elim" to "frame-pointer"="all" as cleanups after D56351
2019-12-25 07:52:21 +08:00
attributes #1 = { optsize "frame-pointer"="all" }