Fix some issues with Mips16 floating when certain intrinsics are present.

This is actually an LLVM bug in the way it generates signatures for these
when soft float is enabled. For example, floor ends up having the signature
of int64(int64). The signature part is not the same as where the actual
parameter types are recorded, and those ARE of course int64(int64) when
soft float is enabled. (Yes, Mips16 hard float uses soft float but with
different runtime rounes but then has to interoperate with Mips32 using
normal floating point). This logic will eventually be moved to the 
Mips16HardFloat pass so it's not worth sorting out these issues in LLVM
since nobody but Mips16 cares about these signatures, as far as I know,
and even I won't eventually either.

llvm-svn: 187613

2 files changed, 420 insertions, 0 deletions

diff --git a/llvm/lib/Target/Mips/Mips16ISelLowering.cpp b/llvm/lib/Target/Mips/Mips16ISelLowering.cpp
index 1ec0f2f6eb3..b3beb126ccf 100644
--- a/llvm/lib/Target/Mips/Mips16ISelLowering.cpp
+++ b/llvm/lib/Target/Mips/Mips16ISelLowering.cpp
@@ -37,6 +37,18 @@ struct Mips16Libcall {
     return std::strcmp(Name, RHS.Name) < 0;
   }
 };
+
+struct Mips16IntrinsicHelperType{
+  const char* Name;
+  const char* Helper;
+
+  bool operator<(const Mips16IntrinsicHelperType &RHS) const {
+    return std::strcmp(Name, RHS.Name) < 0;
+  }
+  bool operator==(const Mips16IntrinsicHelperType &RHS) const {
+    return std::strcmp(Name, RHS.Name) == 0;
+  }
+};
 }
 
 // Libcalls for which no helper is generated. Sorted by name for binary search.
@@ -77,6 +89,31 @@ static const Mips16Libcall HardFloatLibCalls[] = {
   { RTLIB::UO_F32, "__mips16_unordsf2" }
 };
 
+static const Mips16IntrinsicHelperType Mips16IntrinsicHelper[] = {
+  {"ceil",  "__mips16_call_stub_df_2"},
+  {"ceilf", "__mips16_call_stub_sf_1"},
+  {"copysign",  "__mips16_call_stub_df_10"},
+  {"copysignf", "__mips16_call_stub_sf_5"},
+  {"cos",  "__mips16_call_stub_df_2"},
+  {"cosf", "__mips16_call_stub_sf_1"},
+  {"exp2",  "__mips16_call_stub_df_2"},
+  {"exp2f", "__mips16_call_stub_sf_1"},
+  {"floor",  "__mips16_call_stub_df_2"},
+  {"floorf", "__mips16_call_stub_sf_1"},
+  {"log2",  "__mips16_call_stub_df_2"},
+  {"log2f", "__mips16_call_stub_sf_1"},
+  {"nearbyint",  "__mips16_call_stub_df_2"},
+  {"nearbyintf", "__mips16_call_stub_sf_1"},
+  {"rint",  "__mips16_call_stub_df_2"},
+  {"rintf", "__mips16_call_stub_sf_1"},
+  {"sin",  "__mips16_call_stub_df_2"},
+  {"sinf", "__mips16_call_stub_sf_1"},
+  {"sqrt",  "__mips16_call_stub_df_2"},
+  {"sqrtf", "__mips16_call_stub_sf_1"},
+  {"trunc",  "__mips16_call_stub_df_2"},
+  {"truncf", "__mips16_call_stub_sf_1"},
+};
+
 Mips16TargetLowering::Mips16TargetLowering(MipsTargetMachine &TM)
   : MipsTargetLowering(TM) {
   //
@@ -398,6 +435,21 @@ getOpndList(SmallVectorImpl<SDValue> &Ops,
       if (std::binary_search(HardFloatLibCalls, array_endof(HardFloatLibCalls),
                              Find))
         LookupHelper = false;
+      else {
+        Mips16IntrinsicHelperType IntrinsicFind = {S->getSymbol(), ""};
+        // one more look at list of intrinsics
+        if (std::binary_search(Mips16IntrinsicHelper,
+            array_endof(Mips16IntrinsicHelper),
+                                     IntrinsicFind)) {
+          const Mips16IntrinsicHelperType *h =(std::find(Mips16IntrinsicHelper,
+              array_endof(Mips16IntrinsicHelper),
+                                       IntrinsicFind));
+          Mips16HelperFunction = h->Helper;
+          NeedMips16Helper = true;
+          LookupHelper = false;
+        }
+
+      }
     } else if (GlobalAddressSDNode *G =
                    dyn_cast<GlobalAddressSDNode>(CLI.Callee)) {
       Mips16Libcall Find = { RTLIB::UNKNOWN_LIBCALL,
diff --git a/llvm/test/CodeGen/Mips/fp16instrinsmc.ll b/llvm/test/CodeGen/Mips/fp16instrinsmc.ll
new file mode 100644
index 00000000000..3c01d560f7c
--- /dev/null
+++ b/llvm/test/CodeGen/Mips/fp16instrinsmc.ll
@@ -0,0 +1,368 @@
+; RUN: llc -mtriple=mipsel-linux-gnu -march=mipsel -mcpu=mips16 -soft-float -mips16-hard-float -relocation-model=pic < %s | FileCheck %s -check-prefix=pic
+
+@x = global float 1.500000e+00, align 4
+@xn = global float -1.900000e+01, align 4
+@negone = global float -1.000000e+00, align 4
+@one = global float 1.000000e+00, align 4
+@xd = global double 0x40048B0A8EA4481E, align 8
+@xdn = global double 0xC0311F9ADD373963, align 8
+@negoned = global double -1.000000e+00, align 8
+@oned = global float 1.000000e+00, align 4
+@y = common global float 0.000000e+00, align 4
+@yd = common global double 0.000000e+00, align 8
+
+; Function Attrs: nounwind
+define void @foo1() #0 {
+entry:
+  %0 = load float* @x, align 4
+  %1 = load float* @one, align 4
+  %call = call float @copysignf(float %0, float %1) #2
+  store float %call, float* @y, align 4
+  ret void
+}
+
+; Function Attrs: nounwind readnone
+declare float @copysignf(float, float) #1
+
+; Function Attrs: nounwind
+define void @foo2() #0 {
+entry:
+  %0 = load float* @x, align 4
+  %1 = load float* @negone, align 4
+  %call = call float @copysignf(float %0, float %1) #2
+  store float %call, float* @y, align 4
+  ret void
+}
+
+; Function Attrs: nounwind
+define void @foo3() #0 {
+entry:
+  %0 = load double* @xd, align 8
+  %1 = load float* @oned, align 4
+  %conv = fpext float %1 to double
+  %call = call double @copysign(double %0, double %conv) #2
+  store double %call, double* @yd, align 8
+  ret void
+}
+
+; Function Attrs: nounwind readnone
+declare double @copysign(double, double) #1
+
+; Function Attrs: nounwind
+define void @foo4() #0 {
+entry:
+  %0 = load double* @xd, align 8
+  %1 = load double* @negoned, align 8
+  %call = call double @copysign(double %0, double %1) #2
+  store double %call, double* @yd, align 8
+  ret void
+}
+
+; Function Attrs: nounwind
+define void @foo5() #0 {
+entry:
+  %0 = load float* @xn, align 4
+  %call = call float @fabsf(float %0) #2
+  store float %call, float* @y, align 4
+  ret void
+}
+
+; Function Attrs: nounwind readnone
+declare float @fabsf(float) #1
+
+; Function Attrs: nounwind
+define void @foo6() #0 {
+entry:
+  %0 = load double* @xdn, align 8
+  %call = call double @fabs(double %0) #2
+  store double %call, double* @yd, align 8
+  ret void
+}
+
+; Function Attrs: nounwind readnone
+declare double @fabs(double) #1
+
+; Function Attrs: nounwind
+define void @foo7() #0 {
+entry:
+  %0 = load float* @x, align 4
+  %call = call float @sinf(float %0) #3
+;pic:	lw	${{[0-9]+}}, %call16(sinf)(${{[0-9]+}})
+;pic:	lw	${{[0-9]+}}, %got(__mips16_call_stub_sf_1)(${{[0-9]+}})
+  store float %call, float* @y, align 4
+  ret void
+}
+
+; Function Attrs: nounwind
+declare float @sinf(float) #0
+
+; Function Attrs: nounwind
+define void @foo8() #0 {
+entry:
+  %0 = load double* @xd, align 8
+  %call = call double @sin(double %0) #3
+;pic:	lw	${{[0-9]+}}, %call16(sin)(${{[0-9]+}})
+;pic:	lw	${{[0-9]+}}, %got(__mips16_call_stub_df_2)(${{[0-9]+}})
+  store double %call, double* @yd, align 8
+  ret void
+}
+
+; Function Attrs: nounwind
+declare double @sin(double) #0
+
+; Function Attrs: nounwind
+define void @foo9() #0 {
+entry:
+  %0 = load float* @x, align 4
+  %call = call float @cosf(float %0) #3
+;pic:	lw	${{[0-9]+}}, %call16(cosf)(${{[0-9]+}})
+;pic:	lw	${{[0-9]+}}, %got(__mips16_call_stub_sf_1)(${{[0-9]+}})
+  store float %call, float* @y, align 4
+  ret void
+}
+
+; Function Attrs: nounwind
+declare float @cosf(float) #0
+
+; Function Attrs: nounwind
+define void @foo10() #0 {
+entry:
+  %0 = load double* @xd, align 8
+  %call = call double @cos(double %0) #3
+;pic:	lw	${{[0-9]+}}, %call16(cos)(${{[0-9]+}})
+;pic:	lw	${{[0-9]+}}, %got(__mips16_call_stub_df_2)(${{[0-9]+}})
+  store double %call, double* @yd, align 8
+  ret void
+}
+
+; Function Attrs: nounwind
+declare double @cos(double) #0
+
+; Function Attrs: nounwind
+define void @foo11() #0 {
+entry:
+  %0 = load float* @x, align 4
+  %call = call float @sqrtf(float %0) #3
+;pic:	lw	${{[0-9]+}}, %call16(sqrtf)(${{[0-9]+}})
+;pic:	lw	${{[0-9]+}}, %got(__mips16_call_stub_sf_1)(${{[0-9]+}})
+  store float %call, float* @y, align 4
+  ret void
+}
+
+; Function Attrs: nounwind
+declare float @sqrtf(float) #0
+
+; Function Attrs: nounwind
+define void @foo12() #0 {
+entry:
+  %0 = load double* @xd, align 8
+  %call = call double @sqrt(double %0) #3
+;pic:	lw	${{[0-9]+}}, %call16(sqrt)(${{[0-9]+}})
+;pic:	lw	${{[0-9]+}}, %got(__mips16_call_stub_df_2)(${{[0-9]+}})
+  store double %call, double* @yd, align 8
+  ret void
+}
+
+; Function Attrs: nounwind
+declare double @sqrt(double) #0
+
+; Function Attrs: nounwind
+define void @foo13() #0 {
+entry:
+  %0 = load float* @x, align 4
+  %call = call float @floorf(float %0) #2
+;pic:	lw	${{[0-9]+}}, %call16(floorf)(${{[0-9]+}})
+;pic:	lw	${{[0-9]+}}, %got(__mips16_call_stub_sf_1)(${{[0-9]+}})
+  store float %call, float* @y, align 4
+  ret void
+}
+
+; Function Attrs: nounwind readnone
+declare float @floorf(float) #1
+
+; Function Attrs: nounwind
+define void @foo14() #0 {
+entry:
+  %0 = load double* @xd, align 8
+  %call = call double @floor(double %0) #2
+;pic:	lw	${{[0-9]+}}, %call16(floor)(${{[0-9]+}})
+;pic:	lw	${{[0-9]+}}, %got(__mips16_call_stub_df_2)(${{[0-9]+}})
+  store double %call, double* @yd, align 8
+  ret void
+}
+
+; Function Attrs: nounwind readnone
+declare double @floor(double) #1
+
+; Function Attrs: nounwind
+define void @foo15() #0 {
+entry:
+  %0 = load float* @x, align 4
+  %call = call float @nearbyintf(float %0) #2
+;pic:	lw	${{[0-9]+}}, %call16(nearbyintf)(${{[0-9]+}})
+;pic:	lw	${{[0-9]+}}, %got(__mips16_call_stub_sf_1)(${{[0-9]+}})
+  store float %call, float* @y, align 4
+  ret void
+}
+
+; Function Attrs: nounwind readnone
+declare float @nearbyintf(float) #1
+
+; Function Attrs: nounwind
+define void @foo16() #0 {
+entry:
+  %0 = load double* @xd, align 8
+  %call = call double @nearbyint(double %0) #2
+;pic:	lw	${{[0-9]+}}, %call16(nearbyint)(${{[0-9]+}})
+;pic:	lw	${{[0-9]+}}, %got(__mips16_call_stub_df_2)(${{[0-9]+}})
+  store double %call, double* @yd, align 8
+  ret void
+}
+
+; Function Attrs: nounwind readnone
+declare double @nearbyint(double) #1
+
+; Function Attrs: nounwind
+define void @foo17() #0 {
+entry:
+  %0 = load float* @x, align 4
+  %call = call float @ceilf(float %0) #2
+;pic:	lw	${{[0-9]+}}, %call16(ceilf)(${{[0-9]+}})
+;pic:	lw	${{[0-9]+}}, %got(__mips16_call_stub_sf_1)(${{[0-9]+}})
+  store float %call, float* @y, align 4
+  ret void
+}
+
+; Function Attrs: nounwind readnone
+declare float @ceilf(float) #1
+
+; Function Attrs: nounwind
+define void @foo18() #0 {
+entry:
+  %0 = load double* @xd, align 8
+  %call = call double @ceil(double %0) #2
+;pic:	lw	${{[0-9]+}}, %call16(ceil)(${{[0-9]+}})
+;pic:	lw	${{[0-9]+}}, %got(__mips16_call_stub_df_2)(${{[0-9]+}})
+  store double %call, double* @yd, align 8
+  ret void
+}
+
+; Function Attrs: nounwind readnone
+declare double @ceil(double) #1
+
+; Function Attrs: nounwind
+define void @foo19() #0 {
+entry:
+  %0 = load float* @x, align 4
+  %call = call float @rintf(float %0) #2
+;pic:	lw	${{[0-9]+}}, %call16(rintf)(${{[0-9]+}})
+;pic:	lw	${{[0-9]+}}, %got(__mips16_call_stub_sf_1)(${{[0-9]+}})
+  store float %call, float* @y, align 4
+  ret void
+}
+
+; Function Attrs: nounwind readnone
+declare float @rintf(float) #1
+
+; Function Attrs: nounwind
+define void @foo20() #0 {
+entry:
+  %0 = load double* @xd, align 8
+  %call = call double @rint(double %0) #2
+;pic:	lw	${{[0-9]+}}, %call16(rint)(${{[0-9]+}})
+;pic:	lw	${{[0-9]+}}, %got(__mips16_call_stub_df_2)(${{[0-9]+}})
+  store double %call, double* @yd, align 8
+  ret void
+}
+
+; Function Attrs: nounwind readnone
+declare double @rint(double) #1
+
+; Function Attrs: nounwind
+define void @foo21() #0 {
+entry:
+  %0 = load float* @x, align 4
+  %call = call float @truncf(float %0) #2
+;pic:	lw	${{[0-9]+}}, %call16(truncf)(${{[0-9]+}})
+;pic:	lw	${{[0-9]+}}, %got(__mips16_call_stub_sf_1)(${{[0-9]+}})
+  store float %call, float* @y, align 4
+  ret void
+}
+
+; Function Attrs: nounwind readnone
+declare float @truncf(float) #1
+
+; Function Attrs: nounwind
+define void @foo22() #0 {
+entry:
+  %0 = load double* @xd, align 8
+  %call = call double @trunc(double %0) #2
+;pic:	lw	${{[0-9]+}}, %call16(trunc)(${{[0-9]+}})
+;pic:	lw	${{[0-9]+}}, %got(__mips16_call_stub_df_2)(${{[0-9]+}})
+  store double %call, double* @yd, align 8
+  ret void
+}
+
+; Function Attrs: nounwind readnone
+declare double @trunc(double) #1
+
+; Function Attrs: nounwind
+define void @foo23() #0 {
+entry:
+  %0 = load float* @x, align 4
+  %call = call float @log2f(float %0) #3
+;pic:	lw	${{[0-9]+}}, %call16(log2f)(${{[0-9]+}})
+;pic:	lw	${{[0-9]+}}, %got(__mips16_call_stub_sf_1)(${{[0-9]+}})
+  store float %call, float* @y, align 4
+  ret void
+}
+
+; Function Attrs: nounwind
+declare float @log2f(float) #0
+
+; Function Attrs: nounwind
+define void @foo24() #0 {
+entry:
+  %0 = load double* @xd, align 8
+  %call = call double @log2(double %0) #3
+;pic:	lw	${{[0-9]+}}, %call16(log2)(${{[0-9]+}})
+;pic:	lw	${{[0-9]+}}, %got(__mips16_call_stub_df_2)(${{[0-9]+}})
+  store double %call, double* @yd, align 8
+  ret void
+}
+
+; Function Attrs: nounwind
+declare double @log2(double) #0
+
+; Function Attrs: nounwind
+define void @foo25() #0 {
+entry:
+  %0 = load float* @x, align 4
+  %call = call float @exp2f(float %0) #3
+;pic:	lw	${{[0-9]+}}, %call16(exp2f)(${{[0-9]+}})
+;pic:	lw	${{[0-9]+}}, %got(__mips16_call_stub_sf_1)(${{[0-9]+}})
+  store float %call, float* @y, align 4
+  ret void
+}
+
+; Function Attrs: nounwind
+declare float @exp2f(float) #0
+
+; Function Attrs: nounwind
+define void @foo26() #0 {
+entry:
+  %0 = load double* @xd, align 8
+  %call = call double @exp2(double %0) #3
+;pic:	lw	${{[0-9]+}}, %call16(exp2)(${{[0-9]+}})
+;pic:	lw	${{[0-9]+}}, %got(__mips16_call_stub_df_2)(${{[0-9]+}})
+  store double %call, double* @yd, align 8
+  ret void
+}
+
+; Function Attrs: nounwind
+declare double @exp2(double) #0
+
+attributes #0 = { nounwind "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf"="true" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="true" }
+attributes #1 = { nounwind readnone "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf"="true" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="true" }
+attributes #2 = { nounwind readnone }
+attributes #3 = { nounwind }