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llvm-project/llvm/test/CodeGen/X86/fast-isel-x86.ll

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Instruction scheduling itinerary for Intel Atom. Adds an instruction itinerary to all x86 instructions, giving each a default latency of 1, using the InstrItinClass IIC_DEFAULT. Sets specific latencies for Atom for the instructions in files X86InstrCMovSetCC.td, X86InstrArithmetic.td, X86InstrControl.td, and X86InstrShiftRotate.td. The Atom latencies for the remainder of the x86 instructions will be set in subsequent patches. Adds a test to verify that the scheduler is working. Also changes the scheduling preference to "Hybrid" for i386 Atom, while leaving x86_64 as ILP. Patch by Preston Gurd! llvm-svn: 149558
2012-02-02 07:20:51 +08:00
; RUN: llc -fast-isel -O0 -mcpu=generic -mtriple=i386-apple-darwin10 -relocation-model=pic < %s | FileCheck %s
Teach fast isel calls and rets about stdcall. stdcall is callee-pop like thiscall, so the thiscall changes already did most of the work for this. This change only opts stdcall in and adds tests. llvm-svn: 275414
2016-07-14 21:54:26 +08:00
; RUN: llc -fast-isel -O0 -mcpu=generic -mtriple=i386-apple-darwin10 -relocation-model=pic < %s -fast-isel-verbose 2>&1 >/dev/null | FileCheck -check-prefix=STDERR -allow-empty %s
Reapply bottom-up fast-isel, with several fixes for x86-32: - Check getBytesToPopOnReturn(). - Eschew ST0 and ST1 for return values. - Fix the PIC base register initialization so that it doesn't ever fail to end up the top of the entry block. llvm-svn: 108039
2010-07-10 17:00:22 +08:00
; This should use flds to set the return value.
Convert CodeGen/*/*.ll tests to use the new CHECK-LABEL for easier debugging. No functionality change and all tests pass after conversion. This was done with the following sed invocation to catch label lines demarking function boundaries: sed -i '' "s/^;\( *\)\([A-Z0-9_]*\):\( *\)test\([A-Za-z0-9_-]*\):\( *\)$/;\1\2-LABEL:\3test\4:\5/g" test/CodeGen/*/*.ll which was written conservatively to avoid false positives rather than false negatives. I scanned through all the changes and everything looks correct. llvm-svn: 186258
2013-07-14 04:38:47 +08:00
; CHECK-LABEL: test0:
Reapply bottom-up fast-isel, with several fixes for x86-32: - Check getBytesToPopOnReturn(). - Eschew ST0 and ST1 for return values. - Fix the PIC base register initialization so that it doesn't ever fail to end up the top of the entry block. llvm-svn: 108039
2010-07-10 17:00:22 +08:00
; CHECK: flds
[x86] Disambiguate RET[QL] and fix aliases for 16-bit mode I couldn't see how to do this sanely without splitting RETQ from RETL. Eric says: "sad about the inability to roundtrip them now, but...". I have no idea what that means, but perhaps it wants preserving in the commit comment. llvm-svn: 198756
2014-01-08 20:58:07 +08:00
; CHECK: retl
Reapply bottom-up fast-isel, with several fixes for x86-32: - Check getBytesToPopOnReturn(). - Eschew ST0 and ST1 for return values. - Fix the PIC base register initialization so that it doesn't ever fail to end up the top of the entry block. llvm-svn: 108039
2010-07-10 17:00:22 +08:00
@G = external global float
define float @test0() nounwind {
[opaque pointer type] Add textual IR support for explicit type parameter to load instruction Essentially the same as the GEP change in r230786. A similar migration script can be used to update test cases, though a few more test case improvements/changes were required this time around: (r229269-r229278) import fileinput import sys import re pat = re.compile(r"((?:=|:|^)\s*load (?:atomic )?(?:volatile )?(.*?))(| addrspace\(\d+\) *)\*($| *(?:%|@|null|undef|blockaddress|getelementptr|addrspacecast|bitcast|inttoptr|\[\[[a-zA-Z]|\{\{).*$)") for line in sys.stdin: sys.stdout.write(re.sub(pat, r"\1, \2\3*\4", line)) Reviewers: rafael, dexonsmith, grosser Differential Revision: http://reviews.llvm.org/D7649 llvm-svn: 230794
2015-02-28 05:17:42 +08:00
%t = load float, float* @G
Reapply bottom-up fast-isel, with several fixes for x86-32: - Check getBytesToPopOnReturn(). - Eschew ST0 and ST1 for return values. - Fix the PIC base register initialization so that it doesn't ever fail to end up the top of the entry block. llvm-svn: 108039
2010-07-10 17:00:22 +08:00
ret float %t
}
; This should pop 4 bytes on return.
Convert CodeGen/*/*.ll tests to use the new CHECK-LABEL for easier debugging. No functionality change and all tests pass after conversion. This was done with the following sed invocation to catch label lines demarking function boundaries: sed -i '' "s/^;\( *\)\([A-Z0-9_]*\):\( *\)test\([A-Za-z0-9_-]*\):\( *\)$/;\1\2-LABEL:\3test\4:\5/g" test/CodeGen/*/*.ll which was written conservatively to avoid false positives rather than false negatives. I scanned through all the changes and everything looks correct. llvm-svn: 186258
2013-07-14 04:38:47 +08:00
; CHECK-LABEL: test1:
[x86] Disambiguate RET[QL] and fix aliases for 16-bit mode I couldn't see how to do this sanely without splitting RETQ from RETL. Eric says: "sad about the inability to roundtrip them now, but...". I have no idea what that means, but perhaps it wants preserving in the commit comment. llvm-svn: 198756
2014-01-08 20:58:07 +08:00
; CHECK: retl $4
Reapply bottom-up fast-isel, with several fixes for x86-32: - Check getBytesToPopOnReturn(). - Eschew ST0 and ST1 for return values. - Fix the PIC base register initialization so that it doesn't ever fail to end up the top of the entry block. llvm-svn: 108039
2010-07-10 17:00:22 +08:00
define void @test1({i32, i32, i32, i32}* sret %p) nounwind {
store {i32, i32, i32, i32} zeroinitializer, {i32, i32, i32, i32}* %p
ret void
}
Teach FastISel about thiscall (and, hence, about callee-pop). http://reviews.llvm.org/D22115 llvm-svn: 275135
2016-07-12 09:30:35 +08:00
; This should pop 8 bytes on return.
; CHECK-LABEL: thiscallfun:
; CHECK: retl $8
Teach fast isel calls and rets about stdcall. stdcall is callee-pop like thiscall, so the thiscall changes already did most of the work for this. This change only opts stdcall in and adds tests. llvm-svn: 275414
2016-07-14 21:54:26 +08:00
define x86_thiscallcc i32 @thiscallfun(i32* %this, i32 %a, i32 %b) nounwind {
; STDERR-NOT: FastISel missed terminator: ret i32 12345
ret i32 12345
Teach FastISel about thiscall (and, hence, about callee-pop). http://reviews.llvm.org/D22115 llvm-svn: 275135
2016-07-12 09:30:35 +08:00
}
; Here, the callee pop doesn't fit the 16 bit immediate -- see x86-big-ret.ll
; This checks that -fast-isel doesn't miscompile this.
; CHECK-LABEL: thiscall_large:
; CHECK: popl %ecx
; CHECK-NEXT: addl $65536, %esp
; CHECK-NEXT: pushl %ecx
; CHECK-NEXT: retl
define x86_thiscallcc void @thiscall_large(i32* %this, [65533 x i8]* byval %b) nounwind {
ret void
}
Teach fast isel calls and rets about stdcall. stdcall is callee-pop like thiscall, so the thiscall changes already did most of the work for this. This change only opts stdcall in and adds tests. llvm-svn: 275414
2016-07-14 21:54:26 +08:00
; This should pop 4 bytes on return.
; CHECK-LABEL: stdcallfun:
; CHECK: retl $4
define x86_stdcallcc i32 @stdcallfun(i32 %a) nounwind {
; STDERR-NOT: FastISel missed terminator: ret i32 54321
ret i32 54321
}
Reapply bottom-up fast-isel, with several fixes for x86-32: - Check getBytesToPopOnReturn(). - Eschew ST0 and ST1 for return values. - Fix the PIC base register initialization so that it doesn't ever fail to end up the top of the entry block. llvm-svn: 108039
2010-07-10 17:00:22 +08:00
; Properly initialize the pic base.
Convert CodeGen/*/*.ll tests to use the new CHECK-LABEL for easier debugging. No functionality change and all tests pass after conversion. This was done with the following sed invocation to catch label lines demarking function boundaries: sed -i '' "s/^;\( *\)\([A-Z0-9_]*\):\( *\)test\([A-Za-z0-9_-]*\):\( *\)$/;\1\2-LABEL:\3test\4:\5/g" test/CodeGen/*/*.ll which was written conservatively to avoid false positives rather than false negatives. I scanned through all the changes and everything looks correct. llvm-svn: 186258
2013-07-14 04:38:47 +08:00
; CHECK-LABEL: test2:
Reapply bottom-up fast-isel, with several fixes for x86-32: - Check getBytesToPopOnReturn(). - Eschew ST0 and ST1 for return values. - Fix the PIC base register initialization so that it doesn't ever fail to end up the top of the entry block. llvm-svn: 108039
2010-07-10 17:00:22 +08:00
; CHECK-NOT: HHH
Teach fast isel calls and rets about stdcall. stdcall is callee-pop like thiscall, so the thiscall changes already did most of the work for this. This change only opts stdcall in and adds tests. llvm-svn: 275414
2016-07-14 21:54:26 +08:00
; CHECK: call{{.*}}L5$pb
; CHECK-NEXT: L5$pb:
Reapply bottom-up fast-isel, with several fixes for x86-32: - Check getBytesToPopOnReturn(). - Eschew ST0 and ST1 for return values. - Fix the PIC base register initialization so that it doesn't ever fail to end up the top of the entry block. llvm-svn: 108039
2010-07-10 17:00:22 +08:00
; CHECK-NEXT: pop
; CHECK: HHH
[x86] Disambiguate RET[QL] and fix aliases for 16-bit mode I couldn't see how to do this sanely without splitting RETQ from RETL. Eric says: "sad about the inability to roundtrip them now, but...". I have no idea what that means, but perhaps it wants preserving in the commit comment. llvm-svn: 198756
2014-01-08 20:58:07 +08:00
; CHECK: retl
Reapply bottom-up fast-isel, with several fixes for x86-32: - Check getBytesToPopOnReturn(). - Eschew ST0 and ST1 for return values. - Fix the PIC base register initialization so that it doesn't ever fail to end up the top of the entry block. llvm-svn: 108039
2010-07-10 17:00:22 +08:00
@HHH = external global i32
define i32 @test2() nounwind {
[opaque pointer type] Add textual IR support for explicit type parameter to load instruction Essentially the same as the GEP change in r230786. A similar migration script can be used to update test cases, though a few more test case improvements/changes were required this time around: (r229269-r229278) import fileinput import sys import re pat = re.compile(r"((?:=|:|^)\s*load (?:atomic )?(?:volatile )?(.*?))(| addrspace\(\d+\) *)\*($| *(?:%|@|null|undef|blockaddress|getelementptr|addrspacecast|bitcast|inttoptr|\[\[[a-zA-Z]|\{\{).*$)") for line in sys.stdin: sys.stdout.write(re.sub(pat, r"\1, \2\3*\4", line)) Reviewers: rafael, dexonsmith, grosser Differential Revision: http://reviews.llvm.org/D7649 llvm-svn: 230794
2015-02-28 05:17:42 +08:00
%t = load i32, i32* @HHH
Reapply bottom-up fast-isel, with several fixes for x86-32: - Check getBytesToPopOnReturn(). - Eschew ST0 and ST1 for return values. - Fix the PIC base register initialization so that it doesn't ever fail to end up the top of the entry block. llvm-svn: 108039
2010-07-10 17:00:22 +08:00
ret i32 %t
}
fast-isel sret calls, try 2. We actually do need to do something on x86-32. rdar://problem/9303592 . llvm-svn: 130429
2011-04-29 04:19:12 +08:00
; Check that we fast-isel sret, and handle the callee-pops behavior correctly.
%struct.a = type { i64, i64, i64 }
define void @test3() nounwind ssp {
entry:
%tmp = alloca %struct.a, align 8
call void @test3sret(%struct.a* sret %tmp)
ret void
Convert CodeGen/*/*.ll tests to use the new CHECK-LABEL for easier debugging. No functionality change and all tests pass after conversion. This was done with the following sed invocation to catch label lines demarking function boundaries: sed -i '' "s/^;\( *\)\([A-Z0-9_]*\):\( *\)test\([A-Za-z0-9_-]*\):\( *\)$/;\1\2-LABEL:\3test\4:\5/g" test/CodeGen/*/*.ll which was written conservatively to avoid false positives rather than false negatives. I scanned through all the changes and everything looks correct. llvm-svn: 186258
2013-07-14 04:38:47 +08:00
; CHECK-LABEL: test3:
fast-isel sret calls, try 2. We actually do need to do something on x86-32. rdar://problem/9303592 . llvm-svn: 130429
2011-04-29 04:19:12 +08:00
; CHECK: subl $44
; CHECK: leal 16(%esp)
; CHECK: calll _test3sret
; CHECK: addl $40
}
declare void @test3sret(%struct.a* sret)
Fix fastcc structure return with fast-isel on x86-32 On x86-32, structure return via sret lets the callee pop the hidden pointer argument off the stack, which the caller then re-pushes. However if the calling convention is fastcc, then a register is used instead, and the caller should not adjust the stack. This is implemented with a check of IsTailCallConvention X86TargetLowering::LowerCall but is now checked properly in X86FastISel::DoSelectCall. (this time, actually commit what was reviewed!) llvm-svn: 155825
2012-05-01 00:57:15 +08:00
; Check that fast-isel sret works with fastcc (and does not callee-pop)
define void @test4() nounwind ssp {
entry:
%tmp = alloca %struct.a, align 8
call fastcc void @test4fastccsret(%struct.a* sret %tmp)
ret void
Convert CodeGen/*/*.ll tests to use the new CHECK-LABEL for easier debugging. No functionality change and all tests pass after conversion. This was done with the following sed invocation to catch label lines demarking function boundaries: sed -i '' "s/^;\( *\)\([A-Z0-9_]*\):\( *\)test\([A-Za-z0-9_-]*\):\( *\)$/;\1\2-LABEL:\3test\4:\5/g" test/CodeGen/*/*.ll which was written conservatively to avoid false positives rather than false negatives. I scanned through all the changes and everything looks correct. llvm-svn: 186258
2013-07-14 04:38:47 +08:00
; CHECK-LABEL: test4:
Fix fastcc structure return with fast-isel on x86-32 On x86-32, structure return via sret lets the callee pop the hidden pointer argument off the stack, which the caller then re-pushes. However if the calling convention is fastcc, then a register is used instead, and the caller should not adjust the stack. This is implemented with a check of IsTailCallConvention X86TargetLowering::LowerCall but is now checked properly in X86FastISel::DoSelectCall. (this time, actually commit what was reviewed!) llvm-svn: 155825
2012-05-01 00:57:15 +08:00
; CHECK: subl $28
[X86] Optimization for replacing LEA with MOV at frame index elimination time Summary: Replace a LEA instruction of the form 'lea (%esp), %ebx' --> 'mov %esp, %ebx' MOV is preferable over LEA because usually there are more issue-slots available to execute MOVs than LEAs. Latest processors also support zero-latency MOVs. Fixes pr29022. Reviewers: hfinkel, delena, igorb, myatsina, mkuper Differential Revision: https://reviews.llvm.org/D24705 llvm-svn: 282385
2016-09-26 14:42:07 +08:00
; CHECK: movl %esp, %ecx
Fix fastcc structure return with fast-isel on x86-32 On x86-32, structure return via sret lets the callee pop the hidden pointer argument off the stack, which the caller then re-pushes. However if the calling convention is fastcc, then a register is used instead, and the caller should not adjust the stack. This is implemented with a check of IsTailCallConvention X86TargetLowering::LowerCall but is now checked properly in X86FastISel::DoSelectCall. (this time, actually commit what was reviewed!) llvm-svn: 155825
2012-05-01 00:57:15 +08:00
; CHECK: calll _test4fastccsret
Fix broken check lines. I really need to find a way to automate this, but I can't come up with a regex that has no false positives while handling tricky cases like custom check prefixes. llvm-svn: 162097
2012-08-17 20:28:26 +08:00
; CHECK: addl $28
Fix fastcc structure return with fast-isel on x86-32 On x86-32, structure return via sret lets the callee pop the hidden pointer argument off the stack, which the caller then re-pushes. However if the calling convention is fastcc, then a register is used instead, and the caller should not adjust the stack. This is implemented with a check of IsTailCallConvention X86TargetLowering::LowerCall but is now checked properly in X86FastISel::DoSelectCall. (this time, actually commit what was reviewed!) llvm-svn: 155825
2012-05-01 00:57:15 +08:00
}
declare fastcc void @test4fastccsret(%struct.a* sret)
Fast-ISel: Remove dead code after falling back from selecting call instructions (PR20863) Previously, fast-isel would not clean up after failing to select a call instruction, because it would have called flushLocalValueMap() which moves the insertion point, making SavedInsertPt in selectInstruction() invalid. Fixing this by making SavedInsertPt a member variable, and having flushLocalValueMap() update it. This removes some redundant code at -O0, and more importantly fixes PR20863. Differential Revision: http://reviews.llvm.org/D5249 llvm-svn: 217401
2014-09-09 04:24:10 +08:00
; Check that fast-isel cleans up when it fails to lower a call instruction.
define void @test5() {
entry:
%call = call i32 @test5dllimport(i32 42)
ret void
; CHECK-LABEL: test5:
; Local value area is still there:
; CHECK: movl $42, {{%[a-z]+}}
; Fast-ISel's arg push is not here:
; CHECK-NOT: movl $42, (%esp)
; SDag-ISel's arg push:
; CHECK: movl %esp, [[REGISTER:%[a-z]+]]
; CHECK: movl $42, ([[REGISTER]])
Teach fast isel calls and rets about stdcall. stdcall is callee-pop like thiscall, so the thiscall changes already did most of the work for this. This change only opts stdcall in and adds tests. llvm-svn: 275414
2016-07-14 21:54:26 +08:00
; CHECK: movl L_test5dllimport$non_lazy_ptr-L8$pb(%eax), %eax
Refactor X86 symbol access classification. This refactors the logic in X86 to avoid code duplication. It also splits it in two steps: it first decides if a symbol is local to the DSO and then uses that information to decide how to access it. The first part is implemented by shouldAssumeDSOLocal. It is not in any way specific to X86. In a followup patch I intend to move it to somewhere common and reused it in other backends. llvm-svn: 270209
2016-05-20 20:20:10 +08:00
Fast-ISel: Remove dead code after falling back from selecting call instructions (PR20863) Previously, fast-isel would not clean up after failing to select a call instruction, because it would have called flushLocalValueMap() which moves the insertion point, making SavedInsertPt in selectInstruction() invalid. Fixing this by making SavedInsertPt a member variable, and having flushLocalValueMap() update it. This removes some redundant code at -O0, and more importantly fixes PR20863. Differential Revision: http://reviews.llvm.org/D5249 llvm-svn: 217401
2014-09-09 04:24:10 +08:00
}
declare dllimport i32 @test5dllimport(i32)