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