[SPE] Disable strict-fp for SPE by default

As discussed in PR50385, strict-fp on PowerPC SPE has not been handled well. This patch disables it by default for SPE. Reviewed By: nemanjai, vit9696, jhibbits Differential Revision: https://reviews.llvm.org/D103235

Author: ecnelises

clang/lib/Basic/Targets/PPC.cpp

@@ -59,6 +59,7 @@ bool PPCTargetInfo::handleTargetFeatures(std::vector<std::string> &Features,
  } else if (Feature == "+prefix-instrs") {
  HasPrefixInstrs = true;
  } else if (Feature == "+spe" || Feature == "+efpu2") {
+ HasStrictFP = false;
  HasSPE = true;
  LongDoubleWidth = LongDoubleAlign = 64;
  LongDoubleFormat = &llvm::APFloat::IEEEdouble();

clang/test/CodeGen/builtins-ppc-fpconstrained.c

@@ -11,6 +11,9 @@
 // RUN: -fallow-half-arguments-and-returns -S -ffp-exception-behavior=strict \
 // RUN: -o - %s | FileCheck --check-prefix=CHECK-ASM \
 // RUN: --check-prefix=FIXME-CHECK %s
+// RUN: %clang_cc1 -triple powerpcspe -S -ffp-exception-behavior=strict \
+// RUN: -target-feature +spe -fexperimental-strict-floating-point -emit-llvm \
+// RUN: %s -o - | FileCheck --check-prefix=CHECK-CONSTRAINED %s
 
 typedef __attribute__((vector_size(4 * sizeof(float)))) float vec_float;
 typedef __attribute__((vector_size(2 * sizeof(double)))) double vec_double;