DAG: Change behavior of fminnum/fmaxnum nodes
Introduce new versions that follow the IEEE semantics
to help with legalization that may need quieted inputs.
There are some regressions from inserting unnecessary
canonicalizes when these are matched from fast math
fcmp + select which should be fixed in a future commit.
llvm-svn: 344914
diff --git a/llvm/lib/Target/AMDGPU/AMDGPUInstructions.td b/llvm/lib/Target/AMDGPU/AMDGPUInstructions.td
index ab00b1d..b7d1575 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUInstructions.td
+++ b/llvm/lib/Target/AMDGPU/AMDGPUInstructions.td
@@ -152,8 +152,14 @@
def smin_oneuse : HasOneUseBinOp<smin>;
def umax_oneuse : HasOneUseBinOp<umax>;
def umin_oneuse : HasOneUseBinOp<umin>;
+
def fminnum_oneuse : HasOneUseBinOp<fminnum>;
def fmaxnum_oneuse : HasOneUseBinOp<fmaxnum>;
+
+def fminnum_ieee_oneuse : HasOneUseBinOp<fminnum_ieee>;
+def fmaxnum_ieee_oneuse : HasOneUseBinOp<fmaxnum_ieee>;
+
+
def and_oneuse : HasOneUseBinOp<and>;
def or_oneuse : HasOneUseBinOp<or>;
def xor_oneuse : HasOneUseBinOp<xor>;
@@ -837,3 +843,25 @@
(AMDGPUrcp (fsqrt vt:$src)),
(RsqInst $src)
>;
+
+// Instructions which select to the same v_min_f*
+def fminnum_like : PatFrags<(ops node:$src0, node:$src1),
+ [(fminnum_ieee node:$src0, node:$src1),
+ (fminnum node:$src0, node:$src1)]
+>;
+
+// Instructions which select to the same v_max_f*
+def fmaxnum_like : PatFrags<(ops node:$src0, node:$src1),
+ [(fmaxnum_ieee node:$src0, node:$src1),
+ (fmaxnum node:$src0, node:$src1)]
+>;
+
+def fminnum_like_oneuse : PatFrags<(ops node:$src0, node:$src1),
+ [(fminnum_ieee_oneuse node:$src0, node:$src1),
+ (fminnum_oneuse node:$src0, node:$src1)]
+>;
+
+def fmaxnum_like_oneuse : PatFrags<(ops node:$src0, node:$src1),
+ [(fmaxnum_ieee_oneuse node:$src0, node:$src1),
+ (fmaxnum_oneuse node:$src0, node:$src1)]
+>;