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e6df0e6397
LLC was scheduling compares before the adds causing wrong branches to be taken in programs, resulting in misoptimized code wherever atomic adds where used. llvm-svn: 84485
70 lines
3.5 KiB
LLVM
70 lines
3.5 KiB
LLVM
; RUN: llvm-as <%s | llc | FileCheck %s
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; PR 5247
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; check that cmp is not scheduled before the add
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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"
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target triple = "x86_64-unknown-linux-gnu"
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@.str76843 = external constant [45 x i8] ; <[45 x i8]*> [#uses=1]
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@__profiling_callsite_timestamps_live = external global [1216 x i64] ; <[1216 x i64]*> [#uses=2]
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define i32 @cl_init(i32 %initoptions) nounwind {
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entry:
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%retval.i = alloca i32 ; <i32*> [#uses=3]
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%retval = alloca i32 ; <i32*> [#uses=2]
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%initoptions.addr = alloca i32 ; <i32*> [#uses=2]
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tail call void asm sideeffect "cpuid", "~{ax},~{bx},~{cx},~{dx},~{memory},~{dirflag},~{fpsr},~{flags}"() nounwind
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%0 = tail call i64 @llvm.readcyclecounter() nounwind ; <i64> [#uses=1]
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store i32 %initoptions, i32* %initoptions.addr
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%1 = bitcast i32* %initoptions.addr to { }* ; <{ }*> [#uses=0]
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call void asm sideeffect "cpuid", "~{ax},~{bx},~{cx},~{dx},~{memory},~{dirflag},~{fpsr},~{flags}"() nounwind
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%2 = call i64 @llvm.readcyclecounter() nounwind ; <i64> [#uses=1]
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%call.i = call i32 @lt_dlinit() nounwind ; <i32> [#uses=1]
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%tobool.i = icmp ne i32 %call.i, 0 ; <i1> [#uses=1]
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br i1 %tobool.i, label %if.then.i, label %if.end.i
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if.then.i: ; preds = %entry
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%call1.i = call i32 @warn_dlerror(i8* getelementptr inbounds ([45 x i8]* @.str76843, i32 0, i32 0)) nounwind ; <i32> [#uses=0]
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store i32 -1, i32* %retval.i
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br label %lt_init.exit
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if.end.i: ; preds = %entry
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store i32 0, i32* %retval.i
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br label %lt_init.exit
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lt_init.exit: ; preds = %if.end.i, %if.then.i
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%3 = load i32* %retval.i ; <i32> [#uses=1]
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call void asm sideeffect "cpuid", "~{ax},~{bx},~{cx},~{dx},~{memory},~{dirflag},~{fpsr},~{flags}"() nounwind
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%4 = call i64 @llvm.readcyclecounter() nounwind ; <i64> [#uses=1]
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%5 = sub i64 %4, %2 ; <i64> [#uses=1]
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%6 = call i64 @llvm.atomic.load.add.i64.p0i64(i64* getelementptr inbounds ([1216 x i64]* @__profiling_callsite_timestamps_live, i32 0, i32 51), i64 %5) nounwind ; <i64> [#uses=0]
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;CHECK: lock
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;CHECK-NEXT: {{xadd|addq}} %rdx, __profiling_callsite_timestamps_live
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;CHECK-NEXT: cmpl $0,
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;CHECK-NEXT: jne
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%cmp = icmp eq i32 %3, 0 ; <i1> [#uses=1]
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br i1 %cmp, label %if.then, label %if.end
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if.then: ; preds = %lt_init.exit
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call void @cli_rarload()
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br label %if.end
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if.end: ; preds = %if.then, %lt_init.exit
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store i32 0, i32* %retval
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%7 = load i32* %retval ; <i32> [#uses=1]
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tail call void asm sideeffect "cpuid", "~{ax},~{bx},~{cx},~{dx},~{memory},~{dirflag},~{fpsr},~{flags}"() nounwind
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%8 = tail call i64 @llvm.readcyclecounter() nounwind ; <i64> [#uses=1]
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%9 = sub i64 %8, %0 ; <i64> [#uses=1]
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%10 = call i64 @llvm.atomic.load.add.i64.p0i64(i64* getelementptr inbounds ([1216 x i64]* @__profiling_callsite_timestamps_live, i32 0, i32 50), i64 %9) ; <i64> [#uses=0]
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ret i32 %7
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}
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declare void @cli_rarload() nounwind
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declare i32 @lt_dlinit()
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declare i32 @warn_dlerror(i8*) nounwind
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declare i64 @llvm.atomic.load.add.i64.p0i64(i64* nocapture, i64) nounwind
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declare i64 @llvm.readcyclecounter() nounwind
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