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Diffstat (limited to 'test/CodeGen/X86/subreg-to-reg-0.ll')
-rw-r--r-- | test/CodeGen/X86/subreg-to-reg-0.ll | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/test/CodeGen/X86/subreg-to-reg-0.ll b/test/CodeGen/X86/subreg-to-reg-0.ll new file mode 100644 index 000000000000..6b60f6526595 --- /dev/null +++ b/test/CodeGen/X86/subreg-to-reg-0.ll @@ -0,0 +1,11 @@ +; RUN: llvm-as < %s | llc -march=x86-64 | grep mov | count 1 + +; Do eliminate the zero-extension instruction and rely on +; x86-64's implicit zero-extension! + +define i64 @foo(i32* %p) nounwind { + %t = load i32* %p + %n = add i32 %t, 1 + %z = zext i32 %n to i64 + ret i64 %z +} |