[ARM GlobalISel] Legalize G_FPEXT and G_FPTRUNC
Mark G_FPEXT and G_FPTRUNC as legal or libcall, depending on hardware
support, but only for conversions between float and double.
Also add the necessary boilerplate so that the LegalizerHelper can
introduce the required libcalls. This also works only for float and
double, but isn't too difficult to extend when the need arises.
llvm-svn: 322651
diff --git a/llvm/lib/Target/ARM/ARMLegalizerInfo.cpp b/llvm/lib/Target/ARM/ARMLegalizerInfo.cpp
index 3e694b8..7b56008 100644
--- a/llvm/lib/Target/ARM/ARMLegalizerInfo.cpp
+++ b/llvm/lib/Target/ARM/ARMLegalizerInfo.cpp
@@ -178,6 +178,12 @@
setAction({G_MERGE_VALUES, 1, s32}, Legal);
setAction({G_UNMERGE_VALUES, s32}, Legal);
setAction({G_UNMERGE_VALUES, 1, s64}, Legal);
+
+ setAction({G_FPEXT, s64}, Legal);
+ setAction({G_FPEXT, 1, s32}, Legal);
+
+ setAction({G_FPTRUNC, s32}, Legal);
+ setAction({G_FPTRUNC, 1, s64}, Legal);
} else {
for (unsigned BinOp : {G_FADD, G_FSUB, G_FMUL, G_FDIV})
for (auto Ty : {s32, s64})
@@ -192,6 +198,12 @@
setAction({G_FCMP, 1, s32}, Custom);
setAction({G_FCMP, 1, s64}, Custom);
+ setAction({G_FPEXT, s64}, Legal);
+ setAction({G_FPEXT, 1, s32}, Libcall);
+
+ setAction({G_FPTRUNC, s32}, Legal);
+ setAction({G_FPTRUNC, 1, s64}, Libcall);
+
if (AEABI(ST))
setFCmpLibcallsAEABI();
else