1 ; REQUIRES: asserts 2 ; RUN: llc -verify-machineinstrs -mtriple=x86_64-apple-darwin -debug -o /dev/null < %s 2>&1 | FileCheck %s 3 4 ; We need to make sure that rematerialization into a physical register marks the 5 ; super- or sub-register as dead after this rematerialization since only the 6 ; original register is actually used later. Largely irrelevant for a trivial 7 ; example like this, since EAX is never used again, but easy to test. 8 9 define i8 @test_remat() { 10 ret i8 0 11 ; CHECK: REGISTER COALESCING 12 ; CHECK: Remat: %EAX<def,dead> = MOV32r0 %EFLAGS<imp-def,dead>, %AL<imp-def> 13 } 14 15 ; On the other hand, if it's already the correct width, we really shouldn't be 16 ; marking the definition register as dead. 17 18 define i32 @test_remat32() { 19 ret i32 0 20 ; CHECK: REGISTER COALESCING 21 ; CHECK: Remat: %EAX<def> = MOV32r0 %EFLAGS<imp-def,dead> 22 } 23 24
