1 files changed, 42 insertions, 0 deletions
diff --git a/llvm/test/Transforms/Reassociate/mixed-fast-nonfast-fp.ll b/llvm/test/Transforms/Reassociate/mixed-fast-nonfast-fp.ll
new file mode 100644
index 00000000000..14871f45b01
--- /dev/null
+++ b/llvm/test/Transforms/Reassociate/mixed-fast-nonfast-fp.ll
@@ -0,0 +1,42 @@
+; RUN: opt -reassociate %s -S | FileCheck %s
+
+define float @foo(float %a,float %b, float %c) {
+; CHECK-LABEL: @foo(
+; CHECK-NEXT:    [[MUL3:%.*]] = fmul float %a, %b
+; CHECK-NEXT:    [[FACTOR:%.*]] = fmul fast float %c, 2.000000e+00
+; CHECK-NEXT:    [[REASS_ADD1:%.*]] = fadd fast float [[FACTOR]], %b
+; CHECK-NEXT:    [[REASS_MUL:%.*]] = fmul fast float [[REASS_ADD1]], %a
+; CHECK-NEXT:    [[ADD3:%.*]] = fadd fast float [[REASS_MUL]], [[MUL3]]
+; CHECK-NEXT:    ret float [[ADD3]]
+;
+  %mul1 = fmul fast float %a, %c
+  %mul2 = fmul fast float %a, %b
+  %mul3 = fmul float %a, %b   ; STRICT
+  %mul4 = fmul fast float %a, %c
+  %add1 = fadd fast  float %mul1, %mul3
+  %add2 = fadd fast float %mul4, %mul2
+  %add3 = fadd fast float %add1, %add2
+  ret float %add3
+}
+
+define float @foo_reassoc(float %a,float %b, float %c) {
+; CHECK-LABEL: @foo_reassoc(
+; CHECK-NEXT:    [[MUL1:%.*]] = fmul reassoc float %a, %c
+; CHECK-NEXT:    [[MUL2:%.*]] = fmul fast float %b, %a
+; CHECK-NEXT:    [[MUL3:%.*]] = fmul float %a, %b
+; CHECK-NEXT:    [[MUL4:%.*]] = fmul reassoc float %a, %c
+; CHECK-NEXT:    [[ADD1:%.*]] = fadd fast float [[MUL1]], [[MUL3]]
+; CHECK-NEXT:    [[ADD2:%.*]] = fadd reassoc float [[MUL2]], [[MUL4]]
+; CHECK-NEXT:    [[ADD3:%.*]] = fadd fast float [[ADD1]], [[ADD2]]
+; CHECK-NEXT:    ret float [[ADD3]]
+;
+  %mul1 = fmul reassoc float %a, %c
+  %mul2 = fmul fast float %a, %b
+  %mul3 = fmul float %a, %b   ; STRICT
+  %mul4 = fmul reassoc float %a, %c
+  %add1 = fadd fast  float %mul1, %mul3
+  %add2 = fadd reassoc float %mul4, %mul2
+  %add3 = fadd fast float %add1, %add2
+  ret float %add3
+}
+