derek.holloway
7502bf64a4
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56 lines
1.8 KiB
LLVM
56 lines
1.8 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -O3 -S < %s | FileCheck %s
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
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target triple = "x86_64-apple-macosx10.6.7"
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declare ptr @malloc(i64)
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declare void @free(ptr)
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; PR2338
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define void @test1() nounwind ssp {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: ret void
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;
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%retval = alloca i32, align 4
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%i = alloca ptr, align 8
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%call = call ptr @malloc(i64 1)
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store ptr %call, ptr %i, align 8
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%tmp = load ptr, ptr %i, align 8
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store i8 1, ptr %tmp
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%tmp1 = load ptr, ptr %i, align 8
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call void @free(ptr %tmp1)
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ret void
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}
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; This function exposes a phase ordering problem when InstCombine is
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; turning %add into a bitmask, making it difficult to spot a 0 return value.
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;
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; It it also important that %add is expressed as a multiple of %div so scalar
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; evolution can recognize it.
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define i32 @test2(i32 %a, ptr %p) nounwind uwtable ssp {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[DIV1:%.*]] = lshr i32 [[A:%.*]], 2
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; CHECK-NEXT: store i32 [[DIV1]], ptr [[P:%.*]], align 4
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; CHECK-NEXT: [[ADD:%.*]] = shl nuw nsw i32 [[DIV1]], 1
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; CHECK-NEXT: [[ARRAYIDX1:%.*]] = getelementptr inbounds nuw i8, ptr [[P]], i64 4
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; CHECK-NEXT: store i32 [[ADD]], ptr [[ARRAYIDX1]], align 4
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; CHECK-NEXT: ret i32 0
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;
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entry:
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%div = udiv i32 %a, 4
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store i32 %div, ptr %p, align 4
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%add = add i32 %div, %div
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%arrayidx1 = getelementptr inbounds i32, ptr %p, i64 1
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store i32 %add, ptr %arrayidx1, align 4
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%arrayidx2 = getelementptr inbounds i32, ptr %p, i64 1
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%0 = load i32, ptr %arrayidx2, align 4
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%1 = load i32, ptr %p, align 4
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%mul = mul i32 2, %1
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%sub = sub i32 %0, %mul
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ret i32 %sub
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}
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