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| author | Evan Cheng <evan.cheng@apple.com> | 2011-01-05 23:06:49 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2011-01-05 23:06:49 +0000 |
| commit | 0b71d3972d9138c7482233bc44a9a207634769ef (patch) | |
| tree | c598963f2b4ec2581f98f79093def4c3cdcf835c /test/CodeGen/X86/zext-extract_subreg.ll | |
| parent | c010e61ae1f5798dcd14b07eeb4438bcb2d193ca (diff) | |
| download | llvm-0b71d3972d9138c7482233bc44a9a207634769ef.tar.gz llvm-0b71d3972d9138c7482233bc44a9a207634769ef.tar.bz2 llvm-0b71d3972d9138c7482233bc44a9a207634769ef.tar.xz | |
Optimize:
r1025 = s/zext r1024, 4
r1026 = extract_subreg r1025, 4
to:
r1026 = copy r1024
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122925 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/X86/zext-extract_subreg.ll')
| -rw-r--r-- | test/CodeGen/X86/zext-extract_subreg.ll | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/test/CodeGen/X86/zext-extract_subreg.ll b/test/CodeGen/X86/zext-extract_subreg.ll new file mode 100644 index 0000000000..e61e8805a2 --- /dev/null +++ b/test/CodeGen/X86/zext-extract_subreg.ll @@ -0,0 +1,60 @@ +; RUN: llc < %s -mtriple=x86_64-apple-darwin | FileCheck %s + +define void @t() nounwind ssp { +; CHECK: t: +entry: + br i1 undef, label %return, label %if.end.i + +if.end.i: ; preds = %entry + %tmp7.i = load i32* undef, align 4, !tbaa !0 + br i1 undef, label %return, label %if.end + +if.end: ; preds = %if.end.i +; CHECK: %if.end +; CHECK: movl (%{{.*}}), [[REG:%[a-z]+]] +; CHECK-NOT: movl [[REG]], [[REG]] +; CHECK-NEXT: xorb + %tmp138 = select i1 undef, i32 0, i32 %tmp7.i + %tmp867 = zext i32 %tmp138 to i64 + br label %while.cond + +while.cond: ; preds = %while.body, %if.end + %tmp869 = sub i64 %tmp867, 0 + %scale2.0 = trunc i64 %tmp869 to i32 + %cmp149 = icmp eq i32 %scale2.0, 0 + br i1 %cmp149, label %while.end, label %land.rhs + +land.rhs: ; preds = %while.cond + br i1 undef, label %while.body, label %while.end + +while.body: ; preds = %land.rhs + br label %while.cond + +while.end: ; preds = %land.rhs, %while.cond + br i1 undef, label %cond.false205, label %cond.true190 + +cond.true190: ; preds = %while.end + br i1 undef, label %cond.false242, label %cond.true225 + +cond.false205: ; preds = %while.end + unreachable + +cond.true225: ; preds = %cond.true190 + br i1 undef, label %cond.false280, label %cond.true271 + +cond.false242: ; preds = %cond.true190 + unreachable + +cond.true271: ; preds = %cond.true225 + unreachable + +cond.false280: ; preds = %cond.true225 + unreachable + +return: ; preds = %if.end.i, %entry + ret void +} + +!0 = metadata !{metadata !"int", metadata !1} +!1 = metadata !{metadata !"omnipotent char", metadata !2} +!2 = metadata !{metadata !"Simple C/C++ TBAA", null} |