| Chris Lattner | 734d7c2 | 2011-04-26 20:45:33 +0000 | [diff] [blame] | 1 | ; RUN: opt -O3 -S %s | FileCheck %s |
| 2 | |
| 3 | 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" |
| 4 | target triple = "x86_64-apple-macosx10.6.7" |
| 5 | |
| 6 | declare i8* @malloc(i64) |
| 7 | declare void @free(i8*) |
| 8 | |
| 9 | |
| 10 | ; PR2338 |
| 11 | define void @test1() nounwind ssp { |
| 12 | %retval = alloca i32, align 4 |
| 13 | %i = alloca i8*, align 8 |
| 14 | %call = call i8* @malloc(i64 1) |
| 15 | store i8* %call, i8** %i, align 8 |
| 16 | %tmp = load i8** %i, align 8 |
| 17 | store i8 1, i8* %tmp |
| 18 | %tmp1 = load i8** %i, align 8 |
| 19 | call void @free(i8* %tmp1) |
| 20 | ret void |
| 21 | |
| 22 | ; CHECK: @test1 |
| 23 | ; CHECK-NEXT: ret void |
| 24 | } |
| Jakob Stoklund Olesen | 72847f3 | 2012-04-23 17:39:52 +0000 | [diff] [blame] | 25 | |
| 26 | ; This function exposes a phase ordering problem when InstCombine is |
| 27 | ; turning %add into a bitmask, making it difficult to spot a 0 return value. |
| 28 | ; |
| 29 | ; It it also important that %add is expressed as a multiple of %div so scalar |
| 30 | ; evolution can recognize it. |
| 31 | define i32 @test2(i32 %a, i32* %p) nounwind uwtable ssp { |
| 32 | entry: |
| 33 | %div = udiv i32 %a, 4 |
| 34 | %arrayidx = getelementptr inbounds i32* %p, i64 0 |
| 35 | store i32 %div, i32* %arrayidx, align 4 |
| 36 | %add = add i32 %div, %div |
| 37 | %arrayidx1 = getelementptr inbounds i32* %p, i64 1 |
| 38 | store i32 %add, i32* %arrayidx1, align 4 |
| 39 | %arrayidx2 = getelementptr inbounds i32* %p, i64 1 |
| 40 | %0 = load i32* %arrayidx2, align 4 |
| 41 | %arrayidx3 = getelementptr inbounds i32* %p, i64 0 |
| 42 | %1 = load i32* %arrayidx3, align 4 |
| 43 | %mul = mul i32 2, %1 |
| 44 | %sub = sub i32 %0, %mul |
| 45 | ret i32 %sub |
| 46 | |
| 47 | ; CHECK: @test2 |
| 48 | ; CHECK: %div = lshr i32 %a, 2 |
| 49 | ; CHECK: %add = shl nuw nsw i32 %div, 1 |
| 50 | ; CHECK: ret i32 0 |
| 51 | } |