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 9define i8 @test_remat() { 10 ret i8 0 11; CHECK: REGISTER COALESCING 12; CHECK: Remat: dead $eax = MOV32r0 implicit-def dead $eflags, implicit-def $al 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 18define i32 @test_remat32() { 19 ret i32 0 20; CHECK: REGISTER COALESCING 21; CHECK: Remat: $eax = MOV32r0 implicit-def dead $eflags 22} 23 24