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llvm-mirror/test/Transforms/InstCombine/badmalloc.ll
Duncan Sands 32d3986765 Teach instCombine to remove malloc+free if malloc's only uses are comparisons
to null.  Patch by Matti Niemenmaa.

llvm-svn: 104871
2010-05-27 19:09:06 +00:00

21 lines
513 B
LLVM

; 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: @test1
; CHECK: ret i1 %B
}