| ; RUN: opt -O3 -S < %s | FileCheck %s |
| |
| 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" |
| target triple = "x86_64-apple-macosx10.6.7" |
| |
| declare i8* @malloc(i64) |
| declare void @free(i8*) |
| |
| |
| ; PR2338 |
| define void @test1() nounwind ssp { |
| %retval = alloca i32, align 4 |
| %i = alloca i8*, align 8 |
| %call = call i8* @malloc(i64 1) |
| store i8* %call, i8** %i, align 8 |
| %tmp = load i8*, i8** %i, align 8 |
| store i8 1, i8* %tmp |
| %tmp1 = load i8*, i8** %i, align 8 |
| call void @free(i8* %tmp1) |
| ret void |
| |
| ; CHECK-LABEL: @test1( |
| ; CHECK-NEXT: ret void |
| } |
| |
| ; This function exposes a phase ordering problem when InstCombine is |
| ; turning %add into a bitmask, making it difficult to spot a 0 return value. |
| ; |
| ; It it also important that %add is expressed as a multiple of %div so scalar |
| ; evolution can recognize it. |
| define i32 @test2(i32 %a, i32* %p) nounwind uwtable ssp { |
| entry: |
| %div = udiv i32 %a, 4 |
| %arrayidx = getelementptr inbounds i32, i32* %p, i64 0 |
| store i32 %div, i32* %arrayidx, align 4 |
| %add = add i32 %div, %div |
| %arrayidx1 = getelementptr inbounds i32, i32* %p, i64 1 |
| store i32 %add, i32* %arrayidx1, align 4 |
| %arrayidx2 = getelementptr inbounds i32, i32* %p, i64 1 |
| %0 = load i32, i32* %arrayidx2, align 4 |
| %arrayidx3 = getelementptr inbounds i32, i32* %p, i64 0 |
| %1 = load i32, i32* %arrayidx3, align 4 |
| %mul = mul i32 2, %1 |
| %sub = sub i32 %0, %mul |
| ret i32 %sub |
| |
| ; CHECK-LABEL: @test2( |
| ; CHECK: %div = lshr i32 %a, 2 |
| ; CHECK: %add = shl nuw nsw i32 %div, 1 |
| ; CHECK: ret i32 0 |
| } |