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https://github.com/c64scene-ar/llvm-6502.git
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50b8835451
Summary: As a side-quest for D6629 jvoung pointed out that I should use -verify-machineinstrs and this found a bug in x86-32's handling of EFLAGS for PUSHF/POPF. This patch fixes the use/def, and adds -verify-machineinstrs to all x86 tests which contain 'EFLAGS'. One exception: this patch leaves inline-asm-fpstack.ll as-is because it fails -verify-machineinstrs in a way unrelated to EFLAGS. This patch also modifies cmpxchg-clobber-flags.ll along the lines of what D6629 already does by also testing i386. Test Plan: ninja check Reviewers: t.p.northover, jvoung Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D6687 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224359 91177308-0d34-0410-b5e6-96231b3b80d8
24 lines
834 B
LLVM
24 lines
834 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: %EAX<def,dead> = MOV32r0 %EFLAGS<imp-def,dead>, %AL<imp-def>
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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<def> = MOV32r0 %EFLAGS<imp-def,dead>
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}
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