| ; REQUIRES: asserts |
| ; RUN: llc -verify-machineinstrs -mtriple=x86_64-apple-darwin -debug -o /dev/null < %s 2>&1 | FileCheck %s |
| |
| ; We need to make sure that rematerialization into a physical register marks the |
| ; super- or sub-register as dead after this rematerialization since only the |
| ; original register is actually used later. Largely irrelevant for a trivial |
| ; example like this, since eax is never used again, but easy to test. |
| |
| define i8 @test_remat() { |
| ret i8 0 |
| ; CHECK: REGISTER COALESCING |
| ; CHECK: Remat: dead $eax = MOV32r0 implicit-def dead $eflags, implicit-def $al |
| } |
| |
| ; On the other hand, if it's already the correct width, we really shouldn't be |
| ; marking the definition register as dead. |
| |
| define i32 @test_remat32() { |
| ret i32 0 |
| ; CHECK: REGISTER COALESCING |
| ; CHECK: Remat: $eax = MOV32r0 implicit-def dead $eflags |
| } |
| |
