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diff --git a/test/Transforms/InstCombine/2009-01-19-fmod-constant-float-specials.ll b/test/Transforms/InstCombine/2009-01-19-fmod-constant-float-specials.ll
new file mode 100644
index 0000000..79a2f1f
--- /dev/null
+++ b/test/Transforms/InstCombine/2009-01-19-fmod-constant-float-specials.ll
@@ -0,0 +1,316 @@
+; RUN: opt < %s -simplifycfg -instcombine -S | grep 0x7FF8000000000000 | count 7
+; RUN: opt < %s -simplifycfg -instcombine -S | grep 0x7FF00000FFFFFFFF | count 5
+; RUN: opt < %s -simplifycfg -instcombine -S | grep {0\\.0} | count 3
+; RUN: opt < %s -simplifycfg -instcombine -S | grep {3\\.5} | count 1
+;
+
+; ModuleID = 'apf.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"
+@"\01LC" = internal constant [4 x i8] c"%f\0A\00" ; <[4 x i8]*> [#uses=1]
+
+define void @foo1() nounwind {
+entry:
+ %y = alloca float ; <float*> [#uses=2]
+ %x = alloca float ; <float*> [#uses=2]
+ %"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
+ store float 0x7FF0000000000000, float* %x, align 4
+ store float 0x7FF8000000000000, float* %y, align 4
+ %0 = load float* %y, align 4 ; <float> [#uses=1]
+ %1 = fpext float %0 to double ; <double> [#uses=1]
+ %2 = load float* %x, align 4 ; <float> [#uses=1]
+ %3 = fpext float %2 to double ; <double> [#uses=1]
+ %4 = frem double %3, %1 ; <double> [#uses=1]
+ %5 = call i32 (i8*, ...)* @printf(i8* getelementptr ([4 x i8]* @"\01LC", i32 0, i32 0), double %4) nounwind ; <i32> [#uses=0]
+ br label %return
+
+return: ; preds = %entry
+ ret void
+}
+
+declare i32 @printf(i8*, ...) nounwind
+
+define void @foo2() nounwind {
+entry:
+ %y = alloca float ; <float*> [#uses=2]
+ %x = alloca float ; <float*> [#uses=2]
+ %"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
+ store float 0x7FF0000000000000, float* %x, align 4
+ store float 0.000000e+00, float* %y, align 4
+ %0 = load float* %y, align 4 ; <float> [#uses=1]
+ %1 = fpext float %0 to double ; <double> [#uses=1]
+ %2 = load float* %x, align 4 ; <float> [#uses=1]
+ %3 = fpext float %2 to double ; <double> [#uses=1]
+ %4 = frem double %3, %1 ; <double> [#uses=1]
+ %5 = call i32 (i8*, ...)* @printf(i8* getelementptr ([4 x i8]* @"\01LC", i32 0, i32 0), double %4) nounwind ; <i32> [#uses=0]
+ br label %return
+
+return: ; preds = %entry
+ ret void
+}
+
+define void @foo3() nounwind {
+entry:
+ %y = alloca float ; <float*> [#uses=2]
+ %x = alloca float ; <float*> [#uses=2]
+ %"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
+ store float 0x7FF0000000000000, float* %x, align 4
+ store float 3.500000e+00, float* %y, align 4
+ %0 = load float* %y, align 4 ; <float> [#uses=1]
+ %1 = fpext float %0 to double ; <double> [#uses=1]
+ %2 = load float* %x, align 4 ; <float> [#uses=1]
+ %3 = fpext float %2 to double ; <double> [#uses=1]
+ %4 = frem double %3, %1 ; <double> [#uses=1]
+ %5 = call i32 (i8*, ...)* @printf(i8* getelementptr ([4 x i8]* @"\01LC", i32 0, i32 0), double %4) nounwind ; <i32> [#uses=0]
+ br label %return
+
+return: ; preds = %entry
+ ret void
+}
+
+define void @foo4() nounwind {
+entry:
+ %y = alloca float ; <float*> [#uses=2]
+ %x = alloca float ; <float*> [#uses=2]
+ %"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
+ store float 0x7FF0000000000000, float* %x, align 4
+ store float 0x7FF0000000000000, float* %y, align 4
+ %0 = load float* %y, align 4 ; <float> [#uses=1]
+ %1 = fpext float %0 to double ; <double> [#uses=1]
+ %2 = load float* %x, align 4 ; <float> [#uses=1]
+ %3 = fpext float %2 to double ; <double> [#uses=1]
+ %4 = frem double %3, %1 ; <double> [#uses=1]
+ %5 = call i32 (i8*, ...)* @printf(i8* getelementptr ([4 x i8]* @"\01LC", i32 0, i32 0), double %4) nounwind ; <i32> [#uses=0]
+ br label %return
+
+return: ; preds = %entry
+ ret void
+}
+
+define void @foo5() nounwind {
+entry:
+ %y = alloca float ; <float*> [#uses=2]
+ %x = alloca float ; <float*> [#uses=2]
+ %"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
+ store float 0x7FF8000000000000, float* %x, align 4
+ store float 0x7FF0000000000000, float* %y, align 4
+ %0 = load float* %y, align 4 ; <float> [#uses=1]
+ %1 = fpext float %0 to double ; <double> [#uses=1]
+ %2 = load float* %x, align 4 ; <float> [#uses=1]
+ %3 = fpext float %2 to double ; <double> [#uses=1]
+ %4 = frem double %3, %1 ; <double> [#uses=1]
+ %5 = call i32 (i8*, ...)* @printf(i8* getelementptr ([4 x i8]* @"\01LC", i32 0, i32 0), double %4) nounwind ; <i32> [#uses=0]
+ br label %return
+
+return: ; preds = %entry
+ ret void
+}
+
+define void @foo6() nounwind {
+entry:
+ %y = alloca float ; <float*> [#uses=2]
+ %x = alloca float ; <float*> [#uses=2]
+ %"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
+ store float 0x7FF8000000000000, float* %x, align 4
+ store float 0.000000e+00, float* %y, align 4
+ %0 = load float* %y, align 4 ; <float> [#uses=1]
+ %1 = fpext float %0 to double ; <double> [#uses=1]
+ %2 = load float* %x, align 4 ; <float> [#uses=1]
+ %3 = fpext float %2 to double ; <double> [#uses=1]
+ %4 = frem double %3, %1 ; <double> [#uses=1]
+ %5 = call i32 (i8*, ...)* @printf(i8* getelementptr ([4 x i8]* @"\01LC", i32 0, i32 0), double %4) nounwind ; <i32> [#uses=0]
+ br label %return
+
+return: ; preds = %entry
+ ret void
+}
+
+define void @foo7() nounwind {
+entry:
+ %y = alloca float ; <float*> [#uses=2]
+ %x = alloca float ; <float*> [#uses=2]
+ %"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
+ store float 0x7FF8000000000000, float* %x, align 4
+ store float 3.500000e+00, float* %y, align 4
+ %0 = load float* %y, align 4 ; <float> [#uses=1]
+ %1 = fpext float %0 to double ; <double> [#uses=1]
+ %2 = load float* %x, align 4 ; <float> [#uses=1]
+ %3 = fpext float %2 to double ; <double> [#uses=1]
+ %4 = frem double %3, %1 ; <double> [#uses=1]
+ %5 = call i32 (i8*, ...)* @printf(i8* getelementptr ([4 x i8]* @"\01LC", i32 0, i32 0), double %4) nounwind ; <i32> [#uses=0]
+ br label %return
+
+return: ; preds = %entry
+ ret void
+}
+
+define void @foo8() nounwind {
+entry:
+ %y = alloca float ; <float*> [#uses=2]
+ %x = alloca float ; <float*> [#uses=2]
+ %"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
+ store float 0x7FF8000000000000, float* %x, align 4
+ store float 0x7FF8000000000000, float* %y, align 4
+ %0 = load float* %y, align 4 ; <float> [#uses=1]
+ %1 = fpext float %0 to double ; <double> [#uses=1]
+ %2 = load float* %x, align 4 ; <float> [#uses=1]
+ %3 = fpext float %2 to double ; <double> [#uses=1]
+ %4 = frem double %3, %1 ; <double> [#uses=1]
+ %5 = call i32 (i8*, ...)* @printf(i8* getelementptr ([4 x i8]* @"\01LC", i32 0, i32 0), double %4) nounwind ; <i32> [#uses=0]
+ br label %return
+
+return: ; preds = %entry
+ ret void
+}
+
+define void @foo9() nounwind {
+entry:
+ %y = alloca float ; <float*> [#uses=2]
+ %x = alloca float ; <float*> [#uses=2]
+ %"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
+ store float 0.000000e+00, float* %x, align 4
+ store float 0x7FF8000000000000, float* %y, align 4
+ %0 = load float* %y, align 4 ; <float> [#uses=1]
+ %1 = fpext float %0 to double ; <double> [#uses=1]
+ %2 = load float* %x, align 4 ; <float> [#uses=1]
+ %3 = fpext float %2 to double ; <double> [#uses=1]
+ %4 = frem double %3, %1 ; <double> [#uses=1]
+ %5 = call i32 (i8*, ...)* @printf(i8* getelementptr ([4 x i8]* @"\01LC", i32 0, i32 0), double %4) nounwind ; <i32> [#uses=0]
+ br label %return
+
+return: ; preds = %entry
+ ret void
+}
+
+define void @foo10() nounwind {
+entry:
+ %y = alloca float ; <float*> [#uses=2]
+ %x = alloca float ; <float*> [#uses=2]
+ %"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
+ store float 0.000000e+00, float* %x, align 4
+ store float 0x7FF0000000000000, float* %y, align 4
+ %0 = load float* %y, align 4 ; <float> [#uses=1]
+ %1 = fpext float %0 to double ; <double> [#uses=1]
+ %2 = load float* %x, align 4 ; <float> [#uses=1]
+ %3 = fpext float %2 to double ; <double> [#uses=1]
+ %4 = frem double %3, %1 ; <double> [#uses=1]
+ %5 = call i32 (i8*, ...)* @printf(i8* getelementptr ([4 x i8]* @"\01LC", i32 0, i32 0), double %4) nounwind ; <i32> [#uses=0]
+ br label %return
+
+return: ; preds = %entry
+ ret void
+}
+
+define void @foo11() nounwind {
+entry:
+ %y = alloca float ; <float*> [#uses=2]
+ %x = alloca float ; <float*> [#uses=2]
+ %"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
+ store float 0.000000e+00, float* %x, align 4
+ store float 0.000000e+00, float* %y, align 4
+ %0 = load float* %y, align 4 ; <float> [#uses=1]
+ %1 = fpext float %0 to double ; <double> [#uses=1]
+ %2 = load float* %x, align 4 ; <float> [#uses=1]
+ %3 = fpext float %2 to double ; <double> [#uses=1]
+ %4 = frem double %3, %1 ; <double> [#uses=1]
+ %5 = call i32 (i8*, ...)* @printf(i8* getelementptr ([4 x i8]* @"\01LC", i32 0, i32 0), double %4) nounwind ; <i32> [#uses=0]
+ br label %return
+
+return: ; preds = %entry
+ ret void
+}
+
+define void @foo12() nounwind {
+entry:
+ %y = alloca float ; <float*> [#uses=2]
+ %x = alloca float ; <float*> [#uses=2]
+ %"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
+ store float 0.000000e+00, float* %x, align 4
+ store float 3.500000e+00, float* %y, align 4
+ %0 = load float* %y, align 4 ; <float> [#uses=1]
+ %1 = fpext float %0 to double ; <double> [#uses=1]
+ %2 = load float* %x, align 4 ; <float> [#uses=1]
+ %3 = fpext float %2 to double ; <double> [#uses=1]
+ %4 = frem double %3, %1 ; <double> [#uses=1]
+ %5 = call i32 (i8*, ...)* @printf(i8* getelementptr ([4 x i8]* @"\01LC", i32 0, i32 0), double %4) nounwind ; <i32> [#uses=0]
+ br label %return
+
+return: ; preds = %entry
+ ret void
+}
+
+define void @foo13() nounwind {
+entry:
+ %y = alloca float ; <float*> [#uses=2]
+ %x = alloca float ; <float*> [#uses=2]
+ %"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
+ store float 3.500000e+00, float* %x, align 4
+ store float 0x7FF8000000000000, float* %y, align 4
+ %0 = load float* %y, align 4 ; <float> [#uses=1]
+ %1 = fpext float %0 to double ; <double> [#uses=1]
+ %2 = load float* %x, align 4 ; <float> [#uses=1]
+ %3 = fpext float %2 to double ; <double> [#uses=1]
+ %4 = frem double %3, %1 ; <double> [#uses=1]
+ %5 = call i32 (i8*, ...)* @printf(i8* getelementptr ([4 x i8]* @"\01LC", i32 0, i32 0), double %4) nounwind ; <i32> [#uses=0]
+ br label %return
+
+return: ; preds = %entry
+ ret void
+}
+
+define void @foo14() nounwind {
+entry:
+ %y = alloca float ; <float*> [#uses=2]
+ %x = alloca float ; <float*> [#uses=2]
+ %"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
+ store float 3.500000e+00, float* %x, align 4
+ store float 0x7FF0000000000000, float* %y, align 4
+ %0 = load float* %y, align 4 ; <float> [#uses=1]
+ %1 = fpext float %0 to double ; <double> [#uses=1]
+ %2 = load float* %x, align 4 ; <float> [#uses=1]
+ %3 = fpext float %2 to double ; <double> [#uses=1]
+ %4 = frem double %3, %1 ; <double> [#uses=1]
+ %5 = call i32 (i8*, ...)* @printf(i8* getelementptr ([4 x i8]* @"\01LC", i32 0, i32 0), double %4) nounwind ; <i32> [#uses=0]
+ br label %return
+
+return: ; preds = %entry
+ ret void
+}
+
+define void @foo15() nounwind {
+entry:
+ %y = alloca float ; <float*> [#uses=2]
+ %x = alloca float ; <float*> [#uses=2]
+ %"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
+ store float 3.500000e+00, float* %x, align 4
+ store float 0.000000e+00, float* %y, align 4
+ %0 = load float* %y, align 4 ; <float> [#uses=1]
+ %1 = fpext float %0 to double ; <double> [#uses=1]
+ %2 = load float* %x, align 4 ; <float> [#uses=1]
+ %3 = fpext float %2 to double ; <double> [#uses=1]
+ %4 = frem double %3, %1 ; <double> [#uses=1]
+ %5 = call i32 (i8*, ...)* @printf(i8* getelementptr ([4 x i8]* @"\01LC", i32 0, i32 0), double %4) nounwind ; <i32> [#uses=0]
+ br label %return
+
+return: ; preds = %entry
+ ret void
+}
+
+define void @foo16() nounwind {
+entry:
+ %y = alloca float ; <float*> [#uses=2]
+ %x = alloca float ; <float*> [#uses=2]
+ %"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
+ store float 3.500000e+00, float* %x, align 4
+ store float 3.500000e+00, float* %y, align 4
+ %0 = load float* %y, align 4 ; <float> [#uses=1]
+ %1 = fpext float %0 to double ; <double> [#uses=1]
+ %2 = load float* %x, align 4 ; <float> [#uses=1]
+ %3 = fpext float %2 to double ; <double> [#uses=1]
+ %4 = frem double %3, %1 ; <double> [#uses=1]
+ %5 = call i32 (i8*, ...)* @printf(i8* getelementptr ([4 x i8]* @"\01LC", i32 0, i32 0), double %4) nounwind ; <i32> [#uses=0]
+ br label %return
+
+return: ; preds = %entry
+ ret void
+}
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