1 files changed, 69 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/X86/2009-10-19-atomic-cmp-eflags.ll b/llvm/test/CodeGen/X86/2009-10-19-atomic-cmp-eflags.ll
new file mode 100644
index 00000000000..d7f0c1afa3b
--- /dev/null
+++ b/llvm/test/CodeGen/X86/2009-10-19-atomic-cmp-eflags.ll
@@ -0,0 +1,69 @@
+; RUN: llvm-as <%s | llc | FileCheck %s
+; PR 5247
+; check that cmp is not scheduled before the add
+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"
+target triple = "x86_64-unknown-linux-gnu"
+
+@.str76843 = external constant [45 x i8]          ; <[45 x i8]*> [#uses=1]
+@__profiling_callsite_timestamps_live = external global [1216 x i64] ; <[1216 x i64]*> [#uses=2]
+
+define i32 @cl_init(i32 %initoptions) nounwind {
+entry:
+  %retval.i = alloca i32                          ; <i32*> [#uses=3]
+  %retval = alloca i32                            ; <i32*> [#uses=2]
+  %initoptions.addr = alloca i32                  ; <i32*> [#uses=2]
+  tail call void asm sideeffect "cpuid", "~{ax},~{bx},~{cx},~{dx},~{memory},~{dirflag},~{fpsr},~{flags}"() nounwind
+  %0 = tail call i64 @llvm.readcyclecounter() nounwind ; <i64> [#uses=1]
+  store i32 %initoptions, i32* %initoptions.addr
+  %1 = bitcast i32* %initoptions.addr to { }*     ; <{ }*> [#uses=0]
+  call void asm sideeffect "cpuid", "~{ax},~{bx},~{cx},~{dx},~{memory},~{dirflag},~{fpsr},~{flags}"() nounwind
+  %2 = call i64 @llvm.readcyclecounter() nounwind ; <i64> [#uses=1]
+  %call.i = call i32 @lt_dlinit() nounwind        ; <i32> [#uses=1]
+  %tobool.i = icmp ne i32 %call.i, 0              ; <i1> [#uses=1]
+  br i1 %tobool.i, label %if.then.i, label %if.end.i
+
+if.then.i:                                        ; preds = %entry
+  %call1.i = call i32 @warn_dlerror(i8* getelementptr inbounds ([45 x i8]* @.str76843, i32 0, i32 0)) nounwind ; <i32> [#uses=0]
+  store i32 -1, i32* %retval.i
+  br label %lt_init.exit
+
+if.end.i:                                         ; preds = %entry
+  store i32 0, i32* %retval.i
+  br label %lt_init.exit
+
+lt_init.exit:                                     ; preds = %if.end.i, %if.then.i
+  %3 = load i32* %retval.i                        ; <i32> [#uses=1]
+  call void asm sideeffect "cpuid", "~{ax},~{bx},~{cx},~{dx},~{memory},~{dirflag},~{fpsr},~{flags}"() nounwind
+  %4 = call i64 @llvm.readcyclecounter() nounwind ; <i64> [#uses=1]
+  %5 = sub i64 %4, %2                             ; <i64> [#uses=1]
+  %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]
+;CHECK: lock
+;CHECK-NEXT: {{xadd|addq}} %rdx, __profiling_callsite_timestamps_live
+;CHECK-NEXT: cmpl $0,
+;CHECK-NEXT: jne
+  %cmp = icmp eq i32 %3, 0                        ; <i1> [#uses=1]
+  br i1 %cmp, label %if.then, label %if.end
+
+if.then:                                          ; preds = %lt_init.exit
+  call void @cli_rarload()
+  br label %if.end
+
+if.end:                                           ; preds = %if.then, %lt_init.exit
+  store i32 0, i32* %retval
+  %7 = load i32* %retval                          ; <i32> [#uses=1]
+  tail call void asm sideeffect "cpuid", "~{ax},~{bx},~{cx},~{dx},~{memory},~{dirflag},~{fpsr},~{flags}"() nounwind
+  %8 = tail call i64 @llvm.readcyclecounter() nounwind ; <i64> [#uses=1]
+  %9 = sub i64 %8, %0                             ; <i64> [#uses=1]
+  %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]
+  ret i32 %7
+}
+
+declare void @cli_rarload() nounwind
+
+declare i32 @lt_dlinit()
+
+declare i32 @warn_dlerror(i8*) nounwind
+
+declare i64 @llvm.atomic.load.add.i64.p0i64(i64* nocapture, i64) nounwind
+
+declare i64 @llvm.readcyclecounter() nounwind