; Don't crash when attempting to cast a constant FMul to an instruction.
define void @test8(i32* %inout) {
entry:
- %0 = load i32* %inout, align 4
+ %0 = load i32, i32* %inout, align 4
%conv = uitofp i32 %0 to float
%vecinit = insertelement <4 x float> <float 0.000000e+00, float 0.000000e+00, float 0.000000e+00, float undef>, float %conv, i32 3
%sub = fsub <4 x float> <float -0.000000e+00, float -0.000000e+00, float -0.000000e+00, float -0.000000e+00>, %vecinit
; CHECK-NOT: fmul
; CHECK: fsub
}
+
+define float @test11(float %x, float %y) {
+ %a = fadd fast float %x, 1.0
+ %b = fadd fast float %y, 2.0
+ %c = fadd fast float %a, %b
+ ret float %c
+; CHECK-LABEL: @test11(
+; CHECK-NOT: fadd float
+; CHECK: fadd fast float
+}
+
+; PR21126: http://llvm.org/bugs/show_bug.cgi?id=21126
+; With unsafe/fast math, sqrt(X) * sqrt(X) is just X.
+declare double @llvm.sqrt.f64(double)
+
+define double @sqrt_squared1(double %f) {
+ %sqrt = call double @llvm.sqrt.f64(double %f)
+ %mul = fmul fast double %sqrt, %sqrt
+ ret double %mul
+; CHECK-LABEL: @sqrt_squared1(
+; CHECK-NEXT: ret double %f
+}
+
+; With unsafe/fast math, sqrt(X) * sqrt(X) is just X,
+; but make sure another use of the sqrt is intact.
+; Note that the remaining fmul is altered but is not 'fast'
+; itself because it was not marked 'fast' originally.
+; Thus, we have an overall fast result, but no more indication of
+; 'fast'ness in the code.
+define double @sqrt_squared2(double %f) {
+ %sqrt = call double @llvm.sqrt.f64(double %f)
+ %mul1 = fmul fast double %sqrt, %sqrt
+ %mul2 = fmul double %mul1, %sqrt
+ ret double %mul2
+; CHECK-LABEL: @sqrt_squared2(
+; CHECK-NEXT: %sqrt = call double @llvm.sqrt.f64(double %f)
+; CHECK-NEXT: %mul2 = fmul double %sqrt, %f
+; CHECK-NEXT: ret double %mul2
+}