Synthesize x86 max/min instructions also for vectors (i.e. produce

maxps and maxpd).  This broke the sse41-blend.ll testcase by causing
maxpd to be produced rather than a cmp+blend pair, which is the reason
I tweaked it.  Gives a small speedup on doduc with dragonegg when the
GCC vectorizer is used.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139986 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 35 insertions, 3 deletions

diff --git a/test/CodeGen/X86/sse-minmax.ll b/test/CodeGen/X86/sse-minmax.ll
index ff0af25ce2..af1a73b8f1 100644
--- a/test/CodeGen/X86/sse-minmax.ll
+++ b/test/CodeGen/X86/sse-minmax.ll
@@ -1,6 +1,6 @@
-; RUN: llc < %s -march=x86-64 -asm-verbose=false -join-physregs | FileCheck %s
-; RUN: llc < %s -march=x86-64 -asm-verbose=false -join-physregs -enable-unsafe-fp-math -enable-no-nans-fp-math | FileCheck -check-prefix=UNSAFE %s
-; RUN: llc < %s -march=x86-64 -asm-verbose=false -join-physregs -enable-no-nans-fp-math | FileCheck -check-prefix=FINITE %s
+; RUN: llc < %s -march=x86-64 -asm-verbose=false -join-physregs -promote-elements | FileCheck %s
+; RUN: llc < %s -march=x86-64 -asm-verbose=false -join-physregs -enable-unsafe-fp-math -enable-no-nans-fp-math -promote-elements | FileCheck -check-prefix=UNSAFE %s
+; RUN: llc < %s -march=x86-64 -asm-verbose=false -join-physregs -enable-no-nans-fp-math -promote-elements | FileCheck -check-prefix=FINITE %s
 
 ; Some of these patterns can be matched as SSE min or max. Some of
 ; then can be matched provided that the operands are swapped.
@@ -933,3 +933,35 @@ entry:
   %x_addr.0 = select i1 %0, double 3.000000e+03, double %x ; <double> [#uses=1]
   ret double %x_addr.0
 }
+
+; UNSAFE: maxpd:
+; UNSAFE: maxpd
+define <2 x double> @maxpd(<2 x double> %x, <2 x double> %y) {
+  %max_is_x = fcmp oge <2 x double> %x, %y
+  %max = select <2 x i1> %max_is_x, <2 x double> %x, <2 x double> %y
+  ret <2 x double> %max
+}
+
+; UNSAFE: minpd:
+; UNSAFE: minpd
+define <2 x double> @minpd(<2 x double> %x, <2 x double> %y) {
+  %min_is_x = fcmp ole <2 x double> %x, %y
+  %min = select <2 x i1> %min_is_x, <2 x double> %x, <2 x double> %y
+  ret <2 x double> %min
+}
+
+; UNSAFE: maxps:
+; UNSAFE: maxps
+define <4 x float> @maxps(<4 x float> %x, <4 x float> %y) {
+  %max_is_x = fcmp oge <4 x float> %x, %y
+  %max = select <4 x i1> %max_is_x, <4 x float> %x, <4 x float> %y
+  ret <4 x float> %max
+}
+
+; UNSAFE: minps:
+; UNSAFE: minps
+define <4 x float> @minps(<4 x float> %x, <4 x float> %y) {
+  %min_is_x = fcmp ole <4 x float> %x, %y
+  %min = select <4 x i1> %min_is_x, <4 x float> %x, <4 x float> %y
+  ret <4 x float> %min
+}