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| author | Christopher Lamb <christopher.lamb@gmail.com> | 2007-08-10 21:48:46 +0000 |
|---|---|---|
| committer | Christopher Lamb <christopher.lamb@gmail.com> | 2007-08-10 21:48:46 +0000 |
| commit | c59e52108bbfca50b23c5d10706484d4b012c344 (patch) | |
| tree | 66ef3643772f9ca45555550bf33a82adfa46f1ea /test | |
| parent | 6f41435879ccf860aaceef51a2e06bf3f6d25188 (diff) | |
| download | external_llvm-c59e52108bbfca50b23c5d10706484d4b012c344.zip external_llvm-c59e52108bbfca50b23c5d10706484d4b012c344.tar.gz external_llvm-c59e52108bbfca50b23c5d10706484d4b012c344.tar.bz2 | |
Increase efficiency of sign_extend_inreg by using subregisters for truncation. As the README suggests sign_extend_subreg is selected to (sext(trunc)).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41010 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/CodeGen/X86/2007-08-10-SignExtSubreg.ll | 10 | ||||
| -rw-r--r-- | test/CodeGen/X86/shl_elim.ll | 4 |
2 files changed, 12 insertions, 2 deletions
diff --git a/test/CodeGen/X86/2007-08-10-SignExtSubreg.ll b/test/CodeGen/X86/2007-08-10-SignExtSubreg.ll new file mode 100644 index 0000000..c94096a --- /dev/null +++ b/test/CodeGen/X86/2007-08-10-SignExtSubreg.ll @@ -0,0 +1,10 @@ +; RUN: llvm-as < %s | llc -march=x86 | grep {movsbl .al, .eax} + +@X = global i32 0 ; <i32*> [#uses=1] + +define i8 @_Z3fooi(i32 %x) signext { +entry: + store i32 %x, i32* @X, align 4 + %retval67 = trunc i32 %x to i8 ; <i8> [#uses=1] + ret i8 %retval67 +}
\ No newline at end of file diff --git a/test/CodeGen/X86/shl_elim.ll b/test/CodeGen/X86/shl_elim.ll index 3c447f7..d3616f4 100644 --- a/test/CodeGen/X86/shl_elim.ll +++ b/test/CodeGen/X86/shl_elim.ll @@ -1,6 +1,6 @@ ; RUN: llvm-as < %s | llc -march=x86 | grep {movl 8(.esp), %eax} -; RUN: llvm-as < %s | llc -march=x86 | grep {shll .15, .eax} -; RUN: llvm-as < %s | llc -march=x86 | grep {sarl .16, .eax} +; RUN: llvm-as < %s | llc -march=x86 | grep {shrl .eax} +; RUN: llvm-as < %s | llc -march=x86 | grep {movswl .ax, .eax} define i32 @test1(i64 %a) { %tmp29 = lshr i64 %a, 24 ; <i64> [#uses=1] |