| ; RUN: opt < %s -instcombine -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" |
| target triple = "x86_64-apple-darwin10.0" |
| |
| declare noalias i8* @malloc(i64) nounwind |
| declare void @free(i8*) |
| |
| ; PR5130 |
| define i1 @test1() { |
| %A = call noalias i8* @malloc(i64 4) nounwind |
| %B = icmp eq i8* %A, null |
| store i8 0, i8* %A |
| |
| call void @free(i8* %A) |
| ret i1 %B |
| |
| ; CHECK-LABEL: @test1( |
| ; CHECK: ret i1 false |
| } |
| |
| ; CHECK-LABEL: @test2( |
| define noalias i8* @test2() nounwind { |
| entry: |
| ; CHECK: @malloc |
| %A = call noalias i8* @malloc(i64 4) nounwind |
| ; CHECK: icmp eq |
| %tobool = icmp eq i8* %A, null |
| ; CHECK: br i1 |
| br i1 %tobool, label %return, label %if.end |
| |
| if.end: |
| ; CHECK: store |
| store i8 7, i8* %A |
| br label %return |
| |
| return: |
| ; CHECK: phi |
| %retval.0 = phi i8* [ %A, %if.end ], [ null, %entry ] |
| ret i8* %retval.0 |
| } |
