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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
38 lines
1.5 KiB
LLVM
38 lines
1.5 KiB
LLVM
; RUN: llc < %s -verify-machineinstrs -mcpu=generic -mtriple=x86_64-linux | FileCheck %s
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.7.0"
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; In the code below we need to copy the EFLAGS because of scheduling constraints.
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; When copying the EFLAGS we need to write to the stack with push/pop. This forces
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; us to emit the prolog.
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; CHECK: main
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; CHECK: subq{{.*}}rsp
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; CHECK: ret
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define i32 @main(i32 %arg, i8** %arg1) nounwind {
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bb:
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%tmp = alloca i32, align 4 ; [#uses=3 type=i32*]
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%tmp2 = alloca i32, align 4 ; [#uses=3 type=i32*]
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%tmp3 = alloca i32 ; [#uses=1 type=i32*]
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store i32 1, i32* %tmp, align 4
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store i32 1, i32* %tmp2, align 4
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br label %bb4
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bb4: ; preds = %bb4, %bb
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%tmp6 = load i32* %tmp2, align 4 ; [#uses=1 type=i32]
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%tmp7 = add i32 %tmp6, -1 ; [#uses=2 type=i32]
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store i32 %tmp7, i32* %tmp2, align 4
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%tmp8 = icmp eq i32 %tmp7, 0 ; [#uses=1 type=i1]
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%tmp9 = load i32* %tmp ; [#uses=1 type=i32]
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%tmp10 = add i32 %tmp9, -1 ; [#uses=1 type=i32]
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store i32 %tmp10, i32* %tmp3
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br i1 %tmp8, label %bb11, label %bb4
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bb11: ; preds = %bb4
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%tmp12 = load i32* %tmp, align 4 ; [#uses=1 type=i32]
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ret i32 %tmp12
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}
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