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
81 lines
1.7 KiB
LLVM
81 lines
1.7 KiB
LLVM
; RUN: not llvm-as < %s -o /dev/null 2>&1 | FileCheck %s
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define i32 @f1(i32 %x) {
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%y = add i32 %z, 1
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%z = add i32 %x, 1
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ret i32 %y
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; CHECK: Instruction does not dominate all uses!
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; CHECK-NEXT: %z = add i32 %x, 1
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; CHECK-NEXT: %y = add i32 %z, 1
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}
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declare i32 @g()
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define void @f2(i32 %x) personality ptr @g {
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bb0:
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%y1 = invoke i32 @g() to label %bb1 unwind label %bb2
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bb1:
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ret void
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bb2:
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%y2 = phi i32 [%y1, %bb0]
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%y3 = landingpad i32
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cleanup
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ret void
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; CHECK: Instruction does not dominate all uses!
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; CHECK-NEXT: %y1 = invoke i32 @g()
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; CHECK-NEXT: to label %bb1 unwind label %bb2
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; CHECK-NEXT: %y2 = phi i32 [ %y1, %bb0 ]
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}
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define void @f3(i32 %x) personality ptr @g {
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bb0:
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%y1 = invoke i32 @g() to label %bb1 unwind label %bb2
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bb1:
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ret void
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bb2:
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%y2 = landingpad i32
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cleanup
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br label %bb3
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bb3:
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%y3 = phi i32 [%y1, %bb2]
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ret void
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; CHECK: Instruction does not dominate all uses!
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; CHECK-NEXT: %y1 = invoke i32 @g()
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; CHECK-NEXT: to label %bb1 unwind label %bb2
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; CHECK-NEXT: %y3 = phi i32 [ %y1, %bb2 ]
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}
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define void @f4(i32 %x) {
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bb0:
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br label %bb1
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bb1:
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%y3 = phi i32 [%y1, %bb0]
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%y1 = add i32 %x, 1
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ret void
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; CHECK: Instruction does not dominate all uses!
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; CHECK-NEXT: %y1 = add i32 %x, 1
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; CHECK-NEXT: %y3 = phi i32 [ %y1, %bb0 ]
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}
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define void @f5() {
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entry:
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br label %next
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next:
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%y = phi i32 [ 0, %entry ]
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%x = phi i32 [ %y, %entry ]
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ret void
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; CHECK: Instruction does not dominate all uses!
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; CHECK-NEXT: %y = phi i32 [ 0, %entry ]
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; CHECK-NEXT: %x = phi i32 [ %y, %entry ]
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}
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;; No issue!
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define i32 @f6(i32 %x) {
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bb0:
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%y1 = callbr i32 asm "", "=r,!i"() to label %bb1 [label %bb2]
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bb1:
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ret i32 0
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bb2:
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ret i32 %y1
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}
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