[llvm] r371433 - [x86] add test for false dependency with minsize (PR43239); NFC

[Sanjay Patel via llvm-commits]

Author: spatel
Date: Mon Sep  9 11:14:10 2019
New Revision: 371433

URL: http://llvm.org/viewvc/llvm-project?rev=371433&view=rev
Log:
[x86] add test for false dependency with minsize (PR43239); NFC

Modified:
    llvm/trunk/test/CodeGen/X86/sqrt-partial.ll

Modified: llvm/trunk/test/CodeGen/X86/sqrt-partial.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/sqrt-partial.ll?rev=371433&r1=371432&r2=371433&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/X86/sqrt-partial.ll (original)
+++ llvm/trunk/test/CodeGen/X86/sqrt-partial.ll Mon Sep  9 11:14:10 2019
@@ -38,6 +38,22 @@ define double @d(double %val) nounwind {
   ret double %res
 }
 
+define double @minsize(double %x, double %y) minsize {
+; CHECK-LABEL: minsize:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    mulsd %xmm0, %xmm0
+; CHECK-NEXT:    mulsd %xmm1, %xmm1
+; CHECK-NEXT:    addsd %xmm0, %xmm1
+; CHECK-NEXT:    xorps %xmm0, %xmm0
+; CHECK-NEXT:    sqrtsd %xmm1, %xmm0
+; CHECK-NEXT:    retq
+  %t3 = fmul fast double %x, %x
+  %t4 = fmul fast double %y, %y
+  %t5 = fadd fast double %t3, %t4
+  %t6 = tail call fast double @llvm.sqrt.f64(double %t5)
+  ret double %t6
+}
+
 declare float @sqrtf(float)
 declare double @sqrt(double)
-
+declare double @llvm.sqrt.f64(double)