From ba8ac74fd9b64be0d7eee91a73301cd10aac9be6 Mon Sep 17 00:00:00 2001
From: Bob Wilson <bob.wilson@apple.com>
Date: Wed, 24 Feb 2010 22:15:53 +0000
Subject: Check for comparisons of +/- zero when optimizing less-than-or-equal
 and greater-than-or-equal SELECT_CCs to NEON vmin/vmax instructions.  This is
 only allowed when UnsafeFPMath is set or when at least one of the operands is
 known to be nonzero.

llvm-svn: 97065
---
 llvm/test/CodeGen/ARM/neon_minmax.ll | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

(limited to 'llvm/test/CodeGen/ARM/neon_minmax.ll')

diff --git a/llvm/test/CodeGen/ARM/neon_minmax.ll b/llvm/test/CodeGen/ARM/neon_minmax.ll
index 64349d650e9..d301c6a4ca9 100644
--- a/llvm/test/CodeGen/ARM/neon_minmax.ll
+++ b/llvm/test/CodeGen/ARM/neon_minmax.ll
@@ -8,6 +8,14 @@ define float @fmin_ole(float %x) nounwind {
   ret float %min1
 }
 
+define float @fmin_ole_zero(float %x) nounwind {
+;CHECK: fmin_ole_zero:
+;CHECK-NOT: vmin.f32
+  %cond = fcmp ole float 0.0, %x
+  %min1 = select i1 %cond, float 0.0, float %x
+  ret float %min1
+}
+
 define float @fmin_ult(float %x) nounwind {
 ;CHECK: fmin_ult:
 ;CHECK: vmin.f32
@@ -32,6 +40,14 @@ define float @fmax_uge(float %x) nounwind {
   ret float %max1
 }
 
+define float @fmax_uge_zero(float %x) nounwind {
+;CHECK: fmax_uge_zero:
+;CHECK-NOT: vmax.f32
+  %cond = fcmp uge float %x, 0.0
+  %max1 = select i1 %cond, float %x, float 0.0
+  ret float %max1
+}
+
 define float @fmax_olt_reverse(float %x) nounwind {
 ;CHECK: fmax_olt_reverse:
 ;CHECK: vmax.f32
-- 
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