[X86] Add clang codegen test coverage for llvm#104848

Author: RKSimon

clang/test/CodeGen/X86/strictfp_patterns.c

@@ -0,0 +1,32 @@
+// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py
+// RUN: %clang_cc1 %s -O2 -emit-llvm -o - -triple x86_64-unknown-unknown -ffreestanding -ffp-exception-behavior=maytrap -Wall -Werror | FileCheck %s
+
+#include <immintrin.h>
+
+// TODO: PR104848 - ensure the _mm_set_ss/d headers don't implicity promote any integer/fp values.
+
+// CHECK-LABEL: @test_mm_set_ss(
+// CHECK-NEXT:  entry:
+// CHECK-NEXT:    [[VECINIT_I:%.*]] = insertelement <4 x float> poison, float [[NUM:%.*]], i64 0
+// CHECK-NEXT:    [[CONV_I:%.*]] = tail call float @llvm.experimental.constrained.sitofp.f32.i32(i32 0, metadata !"round.tonearest", metadata !"fpexcept.maytrap") #[[ATTR2:[0-9]+]]
+// CHECK-NEXT:    [[VECINIT1_I:%.*]] = insertelement <4 x float> [[VECINIT_I]], float [[CONV_I]], i64 1
+// CHECK-NEXT:    [[VECINIT3_I:%.*]] = insertelement <4 x float> [[VECINIT1_I]], float [[CONV_I]], i64 2
+// CHECK-NEXT:    [[VECINIT5_I:%.*]] = insertelement <4 x float> [[VECINIT3_I]], float [[CONV_I]], i64 3
+// CHECK-NEXT:    ret <4 x float> [[VECINIT5_I]]
+//
+__m128 test_mm_set_ss(float num)
+{
+    return _mm_set_ss(num);
+}
+
+// CHECK-LABEL: @test_mm_set_sd(
+// CHECK-NEXT:  entry:
+// CHECK-NEXT:    [[VECINIT_I:%.*]] = insertelement <2 x double> poison, double [[NUM:%.*]], i64 0
+// CHECK-NEXT:    [[CONV_I:%.*]] = tail call double @llvm.experimental.constrained.sitofp.f64.i32(i32 0, metadata !"round.tonearest", metadata !"fpexcept.maytrap") #[[ATTR2]]
+// CHECK-NEXT:    [[VECINIT1_I:%.*]] = insertelement <2 x double> [[VECINIT_I]], double [[CONV_I]], i64 1
+// CHECK-NEXT:    ret <2 x double> [[VECINIT1_I]]
+//
+__m128d test_mm_set_sd(double num)
+{
+    return _mm_set_sd(num);
+}