forked from OSchip/llvm-project
35 lines
999 B
LLVM
35 lines
999 B
LLVM
; RUN: opt -instcombine -S < %s | FileCheck %s
|
|
|
|
; int foo() {
|
|
; struct V { char buf1[10];
|
|
; int b;
|
|
; char buf2[10];
|
|
; } var;
|
|
;
|
|
; char *p = &var.buf1[1];
|
|
; return __builtin_object_size (p, 0);
|
|
; }
|
|
|
|
%struct.V = type { [10 x i8], i32, [10 x i8] }
|
|
|
|
define i32 @foo() #0 {
|
|
entry:
|
|
%var = alloca %struct.V, align 4
|
|
%0 = bitcast %struct.V* %var to i8*
|
|
call void @llvm.lifetime.start.p0i8(i64 28, i8* %0) #3
|
|
%buf1 = getelementptr inbounds %struct.V, %struct.V* %var, i32 0, i32 0
|
|
%arrayidx = getelementptr inbounds [10 x i8], [10 x i8]* %buf1, i64 0, i64 1
|
|
%1 = call i64 @llvm.objectsize.i64.p0i8(i8* %arrayidx, i1 false)
|
|
%conv = trunc i64 %1 to i32
|
|
call void @llvm.lifetime.end.p0i8(i64 28, i8* %0) #3
|
|
ret i32 %conv
|
|
; CHECK: ret i32 27
|
|
; CHECK-NOT: ret i32 -1
|
|
}
|
|
|
|
declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) #1
|
|
|
|
declare i64 @llvm.objectsize.i64.p0i8(i8*, i1) #2
|
|
|
|
declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) #1
|