| Davide Italiano | 7e274e0 | 2016-12-22 16:03:48 +0000 | [diff] [blame] | 1 | ; RUN: opt -S -basicaa -newgvn < %s | FileCheck %s |
| 2 | ; RUN: opt -S -basicaa -newgvn -disable-simplify-libcalls < %s | FileCheck %s -check-prefix=CHECK_NO_LIBCALLS |
| 3 | ; PR13694 |
| 4 | |
| 5 | 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" |
| 6 | target triple = "x86_64-apple-macosx10.8.0" |
| 7 | |
| 8 | declare i8* @malloc(i64) nounwind |
| 9 | |
| 10 | define noalias i8* @test1() nounwind uwtable ssp { |
| 11 | entry: |
| 12 | %call = tail call i8* @malloc(i64 100) nounwind |
| 13 | %0 = load i8, i8* %call, align 1 |
| 14 | %tobool = icmp eq i8 %0, 0 |
| 15 | br i1 %tobool, label %if.end, label %if.then |
| 16 | |
| 17 | if.then: ; preds = %entry |
| 18 | store i8 0, i8* %call, align 1 |
| 19 | br label %if.end |
| 20 | |
| 21 | if.end: ; preds = %if.then, %entry |
| 22 | ret i8* %call |
| 23 | |
| 24 | ; CHECK-LABEL: @test1( |
| 25 | ; CHECK-NOT: load |
| 26 | ; CHECK-NOT: icmp |
| 27 | |
| 28 | ; CHECK_NO_LIBCALLS-LABEL: @test1( |
| 29 | ; CHECK_NO_LIBCALLS: load |
| 30 | ; CHECK_NO_LIBCALLS: icmp |
| 31 | } |
| 32 | |
| 33 | declare i8* @_Znwm(i64) nounwind |
| 34 | |
| 35 | define noalias i8* @test2() nounwind uwtable ssp { |
| 36 | entry: |
| 37 | %call = tail call i8* @_Znwm(i64 100) nounwind |
| 38 | %0 = load i8, i8* %call, align 1 |
| 39 | %tobool = icmp eq i8 %0, 0 |
| 40 | br i1 %tobool, label %if.end, label %if.then |
| 41 | |
| 42 | if.then: ; preds = %entry |
| 43 | store i8 0, i8* %call, align 1 |
| 44 | br label %if.end |
| 45 | |
| 46 | if.end: ; preds = %if.then, %entry |
| 47 | ret i8* %call |
| 48 | |
| 49 | ; CHECK-LABEL: @test2( |
| 50 | ; CHECK-NOT: load |
| 51 | ; CHECK-NOT: icmp |
| 52 | |
| 53 | ; CHECK_NO_LIBCALLS-LABEL: @test2( |
| 54 | ; CHECK_NO_LIBCALLS: load |
| 55 | ; CHECK_NO_LIBCALLS: icmp |
| 56 | } |