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Diffstat (limited to 'test/CodeGen/AArch64/fast-isel-folding.ll')
-rw-r--r-- | test/CodeGen/AArch64/fast-isel-folding.ll | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/test/CodeGen/AArch64/fast-isel-folding.ll b/test/CodeGen/AArch64/fast-isel-folding.ll new file mode 100644 index 0000000..6b524ff --- /dev/null +++ b/test/CodeGen/AArch64/fast-isel-folding.ll @@ -0,0 +1,54 @@ +; RUN: llc -mtriple=aarch64-apple-darwin -O0 -fast-isel-abort -verify-machineinstrs < %s + +; Test that we don't fold the shift. +define i64 @fold_shift_test(i64 %a, i1 %c) { + %1 = sub i64 %a, 8 + %2 = ashr i64 %1, 3 + br i1 %c, label %bb1, label %bb2 +bb1: + %3 = icmp ult i64 0, %2 + br i1 %3, label %bb2, label %bb3 +bb2: + ret i64 1 +bb3: + ret i64 2 +} + +; Test that we don't fold the sign-extend. +define i64 @fold_sext_test1(i32 %a, i1 %c) { + %1 = sub i32 %a, 8 + %2 = sext i32 %1 to i64 + br i1 %c, label %bb1, label %bb2 +bb1: + %3 = icmp ult i64 0, %2 + br i1 %3, label %bb2, label %bb3 +bb2: + ret i64 1 +bb3: + ret i64 2 +} + +; Test that we don't fold the sign-extend. +define i64 @fold_sext_test2(i32 %a, i1 %c) { + %1 = sub i32 %a, 8 + %2 = sext i32 %1 to i64 + br i1 %c, label %bb1, label %bb2 +bb1: + %3 = shl i64 %2, 4 + ret i64 %3 +bb2: + ret i64 %2 +} + +; Test that we clear the kill flag. +define i32 @fold_kill_test(i32 %a) { + %1 = sub i32 %a, 8 + %2 = shl i32 %1, 3 + %3 = icmp ult i32 0, %2 + br i1 %3, label %bb1, label %bb2 +bb1: + ret i32 %2 +bb2: + %4 = add i32 %2, 4 + ret i32 %4 +} |