diff options
Diffstat (limited to 'test/CodeGen/AArch64/arm64-cast-opt.ll')
-rw-r--r-- | test/CodeGen/AArch64/arm64-cast-opt.ll | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/test/CodeGen/AArch64/arm64-cast-opt.ll b/test/CodeGen/AArch64/arm64-cast-opt.ll new file mode 100644 index 0000000..65a871d --- /dev/null +++ b/test/CodeGen/AArch64/arm64-cast-opt.ll @@ -0,0 +1,31 @@ +; RUN: llc -O3 -march=arm64 -mtriple arm64-apple-ios5.0.0 < %s | FileCheck %s +; <rdar://problem/15992732> +; Zero truncation is not necessary when the values are extended properly +; already. + +@block = common global i8* null, align 8 + +define zeroext i8 @foo(i32 %i1, i32 %i2) { +; CHECK-LABEL: foo: +; CHECK: cset +; CHECK-NOT: and +entry: + %idxprom = sext i32 %i1 to i64 + %0 = load i8** @block, align 8 + %arrayidx = getelementptr inbounds i8* %0, i64 %idxprom + %1 = load i8* %arrayidx, align 1 + %idxprom1 = sext i32 %i2 to i64 + %arrayidx2 = getelementptr inbounds i8* %0, i64 %idxprom1 + %2 = load i8* %arrayidx2, align 1 + %cmp = icmp eq i8 %1, %2 + br i1 %cmp, label %return, label %if.then + +if.then: ; preds = %entry + %cmp7 = icmp ugt i8 %1, %2 + %conv9 = zext i1 %cmp7 to i8 + br label %return + +return: ; preds = %entry, %if.then + %retval.0 = phi i8 [ %conv9, %if.then ], [ 1, %entry ] + ret i8 %retval.0 +} |