1 files changed, 39 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/fsub-fadd.ll b/test/Transforms/InstCombine/fsub-fadd.ll
new file mode 100644
index 0000000..f4cff88
--- /dev/null
+++ b/test/Transforms/InstCombine/fsub-fadd.ll
@@ -0,0 +1,39 @@
+; RUN: opt < %s -instcombine -S | FileCheck %s
+; <rdar://problem/7530098>
+
+define void @func(double* %rhi, double* %rlo, double %xh, double %xl, double %yh, double %yl) nounwind ssp {
+entry:
+  %"alloca point" = bitcast i32 0 to i32          ; <i32> [#uses=0]
+  %tmp = fmul double %xh, 0x41A0000002000000      ; <double> [#uses=2]
+  %tmp1 = fsub double %xh, %tmp                   ; <double> [#uses=1]
+  %tmp2 = fadd double %tmp1, %tmp                 ; <double> [#uses=3]
+  %tmp3 = fsub double %xh, %tmp2                  ; <double> [#uses=2]
+  %tmp4 = fmul double %yh, 0x41A0000002000000     ; <double> [#uses=2]
+  %tmp5 = fsub double %yh, %tmp4                  ; <double> [#uses=1]
+  %tmp6 = fadd double %tmp5, %tmp4                ; <double> [#uses=3]
+  %tmp7 = fsub double %yh, %tmp6                  ; <double> [#uses=2]
+  %tmp8 = fmul double %xh, %yh                    ; <double> [#uses=3]
+  %tmp9 = fmul double %tmp2, %tmp6                ; <double> [#uses=1]
+  %tmp10 = fsub double %tmp9, %tmp8               ; <double> [#uses=1]
+  %tmp11 = fmul double %tmp2, %tmp7               ; <double> [#uses=1]
+  %tmp12 = fadd double %tmp10, %tmp11             ; <double> [#uses=1]
+  %tmp13 = fmul double %tmp3, %tmp6               ; <double> [#uses=1]
+  %tmp14 = fadd double %tmp12, %tmp13             ; <double> [#uses=1]
+  %tmp15 = fmul double %tmp3, %tmp7               ; <double> [#uses=1]
+  %tmp16 = fadd double %tmp14, %tmp15             ; <double> [#uses=1]
+  %tmp17 = fmul double %xh, %yl                   ; <double> [#uses=1]
+  %tmp18 = fmul double %xl, %yh                   ; <double> [#uses=1]
+  %tmp19 = fadd double %tmp17, %tmp18             ; <double> [#uses=1]
+  %tmp20 = fadd double %tmp19, %tmp16             ; <double> [#uses=2]
+  %tmp21 = fadd double %tmp8, %tmp20              ; <double> [#uses=1]
+  store double %tmp21, double* %rhi, align 8
+  %tmp22 = load double* %rhi, align 8             ; <double> [#uses=1]
+  %tmp23 = fsub double %tmp8, %tmp22              ; <double> [#uses=1]
+  %tmp24 = fadd double %tmp23, %tmp20             ; <double> [#uses=1]
+
+; CHECK: %tmp23 = fsub double %tmp8, %tmp21
+; CHECK: %tmp24 = fadd double %tmp23, %tmp20
+
+  store double %tmp24, double* %rlo, align 8
+  ret void
+}