| ; RUN: opt -S -basicaa -gvn < %s | FileCheck %s |
| ; RUN: opt -S -basicaa -gvn -disable-simplify-libcalls < %s | FileCheck %s -check-prefix=CHECK_NO_LIBCALLS |
| ; PR13694 |
| |
| 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-S128" |
| target triple = "x86_64-apple-macosx10.8.0" |
| |
| declare i8* @malloc(i64) nounwind |
| |
| define noalias i8* @test1() nounwind uwtable ssp { |
| entry: |
| %call = tail call i8* @malloc(i64 100) nounwind |
| %0 = load i8, i8* %call, align 1 |
| %tobool = icmp eq i8 %0, 0 |
| br i1 %tobool, label %if.end, label %if.then |
| |
| if.then: ; preds = %entry |
| store i8 0, i8* %call, align 1 |
| br label %if.end |
| |
| if.end: ; preds = %if.then, %entry |
| ret i8* %call |
| |
| ; CHECK-LABEL: @test1( |
| ; CHECK-NOT: load |
| ; CHECK-NOT: icmp |
| |
| ; CHECK_NO_LIBCALLS-LABEL: @test1( |
| ; CHECK_NO_LIBCALLS: load |
| ; CHECK_NO_LIBCALLS: icmp |
| } |
| |
| declare i8* @_Znwm(i64) nounwind |
| |
| define noalias i8* @test2() nounwind uwtable ssp { |
| entry: |
| %call = tail call i8* @_Znwm(i64 100) nounwind |
| %0 = load i8, i8* %call, align 1 |
| %tobool = icmp eq i8 %0, 0 |
| br i1 %tobool, label %if.end, label %if.then |
| |
| if.then: ; preds = %entry |
| store i8 0, i8* %call, align 1 |
| br label %if.end |
| |
| if.end: ; preds = %if.then, %entry |
| ret i8* %call |
| |
| ; CHECK-LABEL: @test2( |
| ; CHECK-NOT: load |
| ; CHECK-NOT: icmp |
| |
| ; CHECK_NO_LIBCALLS-LABEL: @test2( |
| ; CHECK_NO_LIBCALLS: load |
| ; CHECK_NO_LIBCALLS: icmp |
| } |
