Allow constant folding of fma and fmuladd
llvm-svn: 202914
diff --git a/llvm/test/Transforms/InstCombine/constant-fold-math.ll b/llvm/test/Transforms/InstCombine/constant-fold-math.ll
new file mode 100644
index 0000000..00fceb19
--- /dev/null
+++ b/llvm/test/Transforms/InstCombine/constant-fold-math.ll
@@ -0,0 +1,39 @@
+; RUN: opt -S -instcombine < %s | FileCheck %s
+
+declare float @llvm.fma.f32(float, float, float) #0
+declare float @llvm.fmuladd.f32(float, float, float) #0
+
+declare double @llvm.fma.f64(double, double, double) #0
+declare double @llvm.fmuladd.f64(double, double, double) #0
+
+
+
+; CHECK-LABEL: @constant_fold_fma_f32
+; CHECK-NEXT: ret float 6.000000e+00
+define float @constant_fold_fma_f32() #0 {
+ %x = call float @llvm.fma.f32(float 1.0, float 2.0, float 4.0) #0
+ ret float %x
+}
+
+; CHECK-LABEL: @constant_fold_fmuladd_f32
+; CHECK-NEXT: ret float 6.000000e+00
+define float @constant_fold_fmuladd_f32() #0 {
+ %x = call float @llvm.fmuladd.f32(float 1.0, float 2.0, float 4.0) #0
+ ret float %x
+}
+
+; CHECK-LABEL: @constant_fold_fma_f64
+; CHECK-NEXT: ret double 6.000000e+00
+define double @constant_fold_fma_f64() #0 {
+ %x = call double @llvm.fma.f64(double 1.0, double 2.0, double 4.0) #0
+ ret double %x
+}
+
+; CHECK-LABEL: @constant_fold_fmuladd_f64
+; CHECK-NEXT: ret double 6.000000e+00
+define double @constant_fold_fmuladd_f64() #0 {
+ %x = call double @llvm.fmuladd.f64(double 1.0, double 2.0, double 4.0) #0
+ ret double %x
+}
+
+attributes #0 = { nounwind readnone }