AMDGPU/GlobalISel: Legalize s64->s16 G_SITOFP/G_UITOFP
Add widenScalar for TypeIdx == 0 for G_SITOFP/G_UITOFP.
Legailize, using widenScalar, as s64->s32 G_SITOFP/G_UITOFP
followed by s32->s16 G_FPTRUNC.
Differential Revision: https://reviews.llvm.org/D83880
diff --git a/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp b/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
index da519f9..5b6937e 100644
--- a/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
@@ -1908,21 +1908,25 @@
Observer.changedInstr(MI);
return Legalized;
case TargetOpcode::G_SITOFP:
- if (TypeIdx != 1)
- return UnableToLegalize;
Observer.changingInstr(MI);
- widenScalarSrc(MI, WideTy, 1, TargetOpcode::G_SEXT);
+
+ if (TypeIdx == 0)
+ widenScalarDst(MI, WideTy, 0, TargetOpcode::G_FPTRUNC);
+ else
+ widenScalarSrc(MI, WideTy, 1, TargetOpcode::G_SEXT);
+
Observer.changedInstr(MI);
return Legalized;
-
case TargetOpcode::G_UITOFP:
- if (TypeIdx != 1)
- return UnableToLegalize;
Observer.changingInstr(MI);
- widenScalarSrc(MI, WideTy, 1, TargetOpcode::G_ZEXT);
+
+ if (TypeIdx == 0)
+ widenScalarDst(MI, WideTy, 0, TargetOpcode::G_FPTRUNC);
+ else
+ widenScalarSrc(MI, WideTy, 1, TargetOpcode::G_ZEXT);
+
Observer.changedInstr(MI);
return Legalized;
-
case TargetOpcode::G_LOAD:
case TargetOpcode::G_SEXTLOAD:
case TargetOpcode::G_ZEXTLOAD:
