[llvm] r249123 - [mips][microMIPS] Fix an issue with selecting sqrt instruction in LLVM backend

[Zoran Jovanovic via llvm-commits]

Author: zjovanovic
Date: Fri Oct  2 08:06:02 2015
New Revision: 249123

URL: http://llvm.org/viewvc/llvm-project?rev=249123&view=rev
Log:
[mips][microMIPS] Fix an issue with selecting sqrt instruction in LLVM backend
Differential Revision: http://reviews.llvm.org/D13235

Added:
    llvm/trunk/test/CodeGen/Mips/llvm-ir/sqrt.ll
Modified:
    llvm/trunk/lib/Target/Mips/MipsInstrFPU.td

Modified: llvm/trunk/lib/Target/Mips/MipsInstrFPU.td
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/Mips/MipsInstrFPU.td?rev=249123&r1=249122&r2=249123&view=diff
==============================================================================
--- llvm/trunk/lib/Target/Mips/MipsInstrFPU.td (original)
+++ llvm/trunk/lib/Target/Mips/MipsInstrFPU.td Fri Oct  2 08:06:02 2015
@@ -353,11 +353,8 @@ def FNEG_S : MMRel, ABSS_FT<"neg.s", FGR
 defm FABS : ABSS_M<"abs.d", II_ABS, fabs>, ABSS_FM<0x5, 17>;
 defm FNEG : ABSS_M<"neg.d", II_NEG, fneg>, ABSS_FM<0x7, 17>;
 
-let AdditionalPredicates = [NotInMicroMips] in {
-def FSQRT_S : MMRel, ABSS_FT<"sqrt.s", FGR32Opnd, FGR32Opnd, II_SQRT_S, fsqrt>,
-              ABSS_FM<0x4, 16>, ISA_MIPS2;
-}
-
+def FSQRT_S : MMRel, StdMMR6Rel, ABSS_FT<"sqrt.s", FGR32Opnd, FGR32Opnd,
+              II_SQRT_S, fsqrt>, ABSS_FM<0x4, 16>, ISA_MIPS2;
 defm FSQRT : ABSS_M<"sqrt.d", II_SQRT_D, fsqrt>, ABSS_FM<0x4, 17>, ISA_MIPS2;
 
 // The odd-numbered registers are only referenced when doing loads,

Added: llvm/trunk/test/CodeGen/Mips/llvm-ir/sqrt.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/Mips/llvm-ir/sqrt.ll?rev=249123&view=auto
==============================================================================
--- llvm/trunk/test/CodeGen/Mips/llvm-ir/sqrt.ll (added)
+++ llvm/trunk/test/CodeGen/Mips/llvm-ir/sqrt.ll Fri Oct  2 08:06:02 2015
@@ -0,0 +1,13 @@
+; RUN: llc < %s -march=mipsel -mcpu=mips32r2 -mattr=+micromips | FileCheck %s
+; RUN: llc < %s -march=mips -mcpu=mips32r2 -mattr=+micromips | FileCheck %s
+; RUN: llc < %s -march=mips -mcpu=mips32r6 -mattr=+micromips | FileCheck %s
+
+define float @sqrt_fn(float %value) #0 {
+entry:
+  %sqrtf = tail call float @sqrtf(float %value) #0
+  ret float %sqrtf
+}
+
+declare float @sqrtf(float)
+
+; CHECK: sqrt.s $f0, $f12