| ; RUN: llc -mtriple=arm64-apple-ios -o - %s -fast-isel=1 -O0 | FileCheck %s |
| |
| ; The zext can be folded into the load and removed, but doing so can invalidate |
| ; pointers internal to FastISel and cause a crash so it must be done carefully. |
| define i32 @test() { |
| ; CHECK-LABEL: test: |
| ; CHECK: ldrh |
| ; CHECK: bl _callee |
| ; CHECK-NOT: uxth |
| |
| entry: |
| store i32 undef, i32* undef, align 4 |
| %t81 = load i16, i16* undef, align 2 |
| call void @callee() |
| %t82 = zext i16 %t81 to i32 |
| %t83 = shl i32 %t82, 16 |
| %t84 = or i32 undef, %t83 |
| br label %end |
| |
| end: |
| %val = phi i32 [%t84, %entry] |
| ret i32 %val |
| } |
| |
| declare void @callee() |
