derek.holloway
7502bf64a4
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50 lines
1.6 KiB
LLVM
50 lines
1.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 3
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; RUN: opt -S -passes=gvn < %s | FileCheck %s
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declare void @willreturn() nounwind willreturn
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declare void @capture(ptr)
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; Make sure ICF is invalidated when the callee becomes known.
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define i64 @test(ptr %p) {
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; CHECK-LABEL: define i64 @test(
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; CHECK-SAME: ptr [[P:%.*]]) {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[A:%.*]] = alloca [2 x ptr], align 8
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; CHECK-NEXT: [[A2:%.*]] = getelementptr ptr, ptr [[A]], i64 1
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; CHECK-NEXT: call void @capture(ptr [[A]])
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; CHECK-NEXT: br i1 false, label [[IF:%.*]], label [[ENTRY_EXIT_CRIT_EDGE:%.*]]
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; CHECK: entry.exit_crit_edge:
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; CHECK-NEXT: [[RES_PRE:%.*]] = load i64, ptr [[A2]], align 8
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; CHECK-NEXT: br label [[EXIT:%.*]]
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; CHECK: if:
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; CHECK-NEXT: [[P1:%.*]] = load ptr, ptr [[A2]], align 8
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; CHECK-NEXT: br label [[EXIT]]
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; CHECK: exit:
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; CHECK-NEXT: [[RES:%.*]] = phi i64 [ [[RES_PRE]], [[ENTRY_EXIT_CRIT_EDGE]] ], [ poison, [[IF]] ]
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; CHECK-NEXT: store ptr @willreturn, ptr [[P]], align 8
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; CHECK-NEXT: tail call void @willreturn()
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; CHECK-NEXT: ret i64 [[RES]]
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;
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entry:
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%a = alloca [2 x ptr], align 8
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%a2 = getelementptr ptr, ptr %a, i64 1
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call void @capture(ptr %a)
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br i1 false, label %if, label %exit
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if:
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%p0 = load ptr, ptr %a, align 8
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%p1 = load ptr, ptr %a2, align 8
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br label %exit
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exit:
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store ptr @willreturn, ptr %p
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%p2 = load ptr, ptr %a, align 8
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%pgocount.i = load i64, ptr %p2, align 8
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%fn = load ptr, ptr %p
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tail call void %fn()
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%res = load i64, ptr %a2, align 8
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ret i64 %res
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}
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