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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
35 lines
910 B
LLVM
35 lines
910 B
LLVM
; RUN: llc < %s -verify-machineinstrs -mtriple=i686-linux -mattr=-sse | FileCheck %s
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; PR11768
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@ptr = external global i8*
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define void @baz() nounwind ssp {
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entry:
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%0 = load i8** @ptr, align 4
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%cmp = icmp eq i8* %0, null
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fence seq_cst
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br i1 %cmp, label %if.then, label %if.else
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; Make sure the fence comes before the comparison, since it
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; clobbers EFLAGS.
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; CHECK: lock
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; CHECK-NEXT: orl {{.*}}, (%esp)
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; CHECK-NEXT: testl [[REG:%e[a-z]+]], [[REG]]
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if.then: ; preds = %entry
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tail call void bitcast (void (...)* @foo to void ()*)() nounwind
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br label %if.end
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if.else: ; preds = %entry
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tail call void bitcast (void (...)* @bar to void ()*)() nounwind
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br label %if.end
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if.end: ; preds = %if.else, %if.then
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ret void
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}
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declare void @foo(...)
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declare void @bar(...)
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