1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
|
; 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
}
|
