1 files changed, 77 insertions, 0 deletions
diff --git a/llvm/test/Transforms/InstCombine/2009-01-19-fmod-constant-float.ll b/llvm/test/Transforms/InstCombine/2009-01-19-fmod-constant-float.ll
new file mode 100644
index 00000000000..7c63ff69246
--- /dev/null
+++ b/llvm/test/Transforms/InstCombine/2009-01-19-fmod-constant-float.ll
@@ -0,0 +1,77 @@
+; RUN: llvm-as < %s | opt -simplifycfg -instcombine | llvm-dis | grep 0x3FB99999A0000000 | count 2
+; RUN: llvm-as < %s | opt -simplifycfg -instcombine | llvm-dis | grep 0xBFB99999A0000000 | count 2
+; check constant folding for 'frem'.  PR 3316.
+
+; ModuleID = 'tt.c'
+target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
+target triple = "i386-apple-darwin9.6"
+
+define float @test1() nounwind {
+entry:
+	%retval = alloca float		; <float*> [#uses=2]
+	%0 = alloca float		; <float*> [#uses=2]
+	%"alloca point" = bitcast i32 0 to i32		; <i32> [#uses=0]
+	%1 = call double @fmod(double 1.000000e-01, double 1.000000e+00) nounwind readonly		; <double> [#uses=1]
+	%2 = fptrunc double %1 to float		; <float> [#uses=1]
+	store float %2, float* %0, align 4
+	%3 = load float* %0, align 4		; <float> [#uses=1]
+	store float %3, float* %retval, align 4
+	br label %return
+
+return:		; preds = %entry
+	%retval1 = load float* %retval		; <float> [#uses=1]
+	ret float %retval1
+}
+
+declare double @fmod(double, double) nounwind readonly
+
+define float @test2() nounwind {
+entry:
+	%retval = alloca float		; <float*> [#uses=2]
+	%0 = alloca float		; <float*> [#uses=2]
+	%"alloca point" = bitcast i32 0 to i32		; <i32> [#uses=0]
+	%1 = call double @fmod(double -1.000000e-01, double 1.000000e+00) nounwind readonly		; <double> [#uses=1]
+	%2 = fptrunc double %1 to float		; <float> [#uses=1]
+	store float %2, float* %0, align 4
+	%3 = load float* %0, align 4		; <float> [#uses=1]
+	store float %3, float* %retval, align 4
+	br label %return
+
+return:		; preds = %entry
+	%retval1 = load float* %retval		; <float> [#uses=1]
+	ret float %retval1
+}
+
+define float @test3() nounwind {
+entry:
+	%retval = alloca float		; <float*> [#uses=2]
+	%0 = alloca float		; <float*> [#uses=2]
+	%"alloca point" = bitcast i32 0 to i32		; <i32> [#uses=0]
+	%1 = call double @fmod(double 1.000000e-01, double -1.000000e+00) nounwind readonly		; <double> [#uses=1]
+	%2 = fptrunc double %1 to float		; <float> [#uses=1]
+	store float %2, float* %0, align 4
+	%3 = load float* %0, align 4		; <float> [#uses=1]
+	store float %3, float* %retval, align 4
+	br label %return
+
+return:		; preds = %entry
+	%retval1 = load float* %retval		; <float> [#uses=1]
+	ret float %retval1
+}
+
+define float @test4() nounwind {
+entry:
+	%retval = alloca float		; <float*> [#uses=2]
+	%0 = alloca float		; <float*> [#uses=2]
+	%"alloca point" = bitcast i32 0 to i32		; <i32> [#uses=0]
+	%1 = call double @fmod(double -1.000000e-01, double -1.000000e+00) nounwind readonly		; <double> [#uses=1]
+	%2 = fptrunc double %1 to float		; <float> [#uses=1]
+	store float %2, float* %0, align 4
+	%3 = load float* %0, align 4		; <float> [#uses=1]
+	store float %3, float* %retval, align 4
+	br label %return
+
+return:		; preds = %entry
+	%retval1 = load float* %retval		; <float> [#uses=1]
+	ret float %retval1
+}