diff options
Diffstat (limited to 'llvm/test/Transforms/GVN/rle.ll')
| -rw-r--r-- | llvm/test/Transforms/GVN/rle.ll | 52 |
1 files changed, 51 insertions, 1 deletions
diff --git a/llvm/test/Transforms/GVN/rle.ll b/llvm/test/Transforms/GVN/rle.ll index 04b38e4eb7f..afdcd5daa62 100644 --- a/llvm/test/Transforms/GVN/rle.ll +++ b/llvm/test/Transforms/GVN/rle.ll @@ -199,7 +199,7 @@ Cont: ;; types, and the reload is an offset from the store pointer. ;;===----------------------------------------------------------------------===;; -;; i32 -> f32 forwarding. +;; i32 -> i8 forwarding. ;; PR4216 define i8 @coerce_offset0(i32 %V, i32* %P) { store i32 %V, i32* %P @@ -214,5 +214,55 @@ define i8 @coerce_offset0(i32 %V, i32* %P) { ; CHECK: ret i8 } +;; non-local i32/float -> i8 load forwarding. +define i8 @coerce_offset_nonlocal0(i32* %P, i1 %cond) { + %P2 = bitcast i32* %P to float* + %P3 = bitcast i32* %P to i8* + %P4 = getelementptr i8* %P3, i32 2 + br i1 %cond, label %T, label %F +T: + store i32 42, i32* %P + br label %Cont + +F: + store float 1.0, float* %P2 + br label %Cont + +Cont: + %A = load i8* %P4 + ret i8 %A + +; CHECK: @coerce_offset_nonlocal0 +; CHECK: Cont: +; CHECK: %A = phi i8 [ +; CHECK-NOT: load +; CHECK: ret i8 %A +} + + +;; non-local i32 -> i8 partial redundancy load forwarding. +define i8 @coerce_offset_pre0(i32* %P, i1 %cond) { + %P3 = bitcast i32* %P to i8* + %P4 = getelementptr i8* %P3, i32 2 + br i1 %cond, label %T, label %F +T: + store i32 42, i32* %P + br label %Cont + +F: + br label %Cont + +Cont: + %A = load i8* %P4 + ret i8 %A + +; CHECK: @coerce_offset_pre0 +; CHECK: F: +; CHECK: load i8* %P4 +; CHECK: Cont: +; CHECK: %A = phi i8 [ +; CHECK-NOT: load +; CHECK: ret i8 %A +} |
