Add a neat little two's complement hack for x86.

[oota-llvm.git] / test / CodeGen / X86 / 2008-10-27-CoalescerBug.ll

diff --git a/test/CodeGen/X86/2008-10-27-CoalescerBug.ll b/test/CodeGen/X86/2008-10-27-CoalescerBug.ll
index 2c8e12fb26ff770d1cd8d7b0495abdad4ee860b3..9d144a4be0e908f7300a386673ccfde3fb07d6a7 100644 (file)
--- a/test/CodeGen/X86/2008-10-27-CoalescerBug.ll
+++ b/test/CodeGen/X86/2008-10-27-CoalescerBug.ll
@@ -1,6 +1,9 @@
-; RUN: llvm-as < %s | llc -march=x86 -mattr=+sse2 -stats |& not grep {Number of register spills}
+; RUN: llc < %s -mtriple=i386-apple-darwin -mattr=+sse2 -stats |& FileCheck %s
+; Now this test spills one register. But a reload in the loop is cheaper than
+; the divsd so it's a win.
 
 define fastcc void @fourn(double* %data, i32 %isign) nounwind {
+; CHECK: fourn
 entry:
        br label %bb
 
@@ -11,6 +14,11 @@ bb:          ; preds = %bb, %entry
        %1 = icmp sgt i32 %0, 2         ; <i1> [#uses=1]
        br i1 %1, label %bb30.loopexit, label %bb
 
+; CHECK: %bb30.loopexit
+; CHECK: divsd %xmm0
+; CHECK: movsd %xmm0, 16(%esp)
+; CHECK: .align
+; CHECK-NEXT: %bb3
 bb3:           ; preds = %bb30.loopexit, %bb25, %bb3
        %2 = load i32* null, align 4            ; <i32> [#uses=1]
        %3 = mul i32 %2, 0              ; <i32> [#uses=1]
@@ -26,7 +34,7 @@ bb22.preheader:               ; preds = %bb24.preheader, %bb22.preheader
        br label %bb22.preheader
 
 bb25:          ; preds = %bb24.preheader
-       %7 = mul double 0.000000e+00, %6                ; <double> [#uses=0]
+       %7 = fmul double 0.000000e+00, %6               ; <double> [#uses=0]
        %8 = add i32 %i3.122100, 0              ; <i32> [#uses=1]
        %9 = icmp sgt i32 %8, 0         ; <i1> [#uses=1]
        br i1 %9, label %bb3, label %bb24.preheader
@@ -37,7 +45,7 @@ bb24.preheader:               ; preds = %bb25, %bb18
        br i1 %10, label %bb25, label %bb22.preheader
 
 bb30.loopexit:         ; preds = %bb
-       %11 = mul double 0.000000e+00, 0x401921FB54442D1C               ; <double> [#uses=1]
+       %11 = fmul double 0.000000e+00, 0x401921FB54442D1C              ; <double> [#uses=1]
        br label %bb3
 }