45a291b5f6
This will be necessary to support outputs from asm goto along indirect
edges.
Test via:
$ pushd llvm/build; ninja IRTests; popd
$ ./llvm/build/unittests/IR/IRTests \
--gtest_filter=DominatorTree.CallBrDomination
Also, return nullptr in Instruction::getInsertionPointAfterDef for
CallBrInst as was recommened in
https://reviews.llvm.org/D135997#3991427. The following phab review was
folded into this commit: https://reviews.llvm.org/D140166
Link: Link: https://discourse.llvm.org/t/rfc-syncing-asm-goto-with-outputs-with-gcc/65453/8
Reviewed By: void, efriedma, ChuanqiXu, MaskRay
Differential Revision: https://reviews.llvm.org/D135997
28 lines
823 B
LLVM
28 lines
823 B
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -S -passes=reassociate < %s | FileCheck %s
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define i32 @test(i1 %b) {
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; CHECK-LABEL: @test(
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; CHECK-NEXT: [[RES:%.*]] = callbr i32 asm "", "=r,!i"()
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; CHECK-NEXT: to label [[NORMAL:%.*]] [label %abnormal]
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; CHECK: normal:
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; CHECK-NEXT: [[RES_NEG:%.*]] = sub i32 0, [[RES]]
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; CHECK-NEXT: [[SUB1:%.*]] = add i32 [[RES_NEG]], 5
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; CHECK-NEXT: [[RES_NEG1:%.*]] = sub i32 0, [[RES]]
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; CHECK-NEXT: [[SUB2:%.*]] = add i32 [[SUB1]], [[RES_NEG1]]
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; CHECK-NEXT: ret i32 [[SUB2]]
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; CHECK: abnormal:
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; CHECK-NEXT: ret i32 0
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;
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%res = callbr i32 asm "", "=r,!i"()
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to label %normal [label %abnormal]
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normal:
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%sub1 = sub nsw i32 5, %res
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%sub2 = sub nsw i32 %sub1, %res
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ret i32 %sub2
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abnormal:
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ret i32 0
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}
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