| ; RUN: opt -S -passes=instcombine %s -o - | FileCheck %s |
| |
| ; Regression test of PR31990. A memcpy of one byte, copying 0xff, was |
| ; replaced with a single store of an i4 0xf. |
| |
| @g = constant i8 -1 |
| |
| define void @foo() { |
| entry: |
| %0 = alloca i8 |
| call void @bar(ptr %0) |
| call void @llvm.memcpy.p0.p0.i32(ptr %0, ptr @g, i32 1, i1 false) |
| call void @gaz(ptr %0) |
| ret void |
| } |
| |
| declare void @llvm.memcpy.p0.p0.i32(ptr nocapture writeonly, ptr nocapture readonly, i32, i1) |
| declare void @bar(ptr) |
| declare void @gaz(ptr) |
| |
| ; The mempcy should be simplified to a single store of an i8, not i4 |
| ; CHECK: store i8 -1 |
| ; CHECK-NOT: store i4 -1 |
