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| author | Quentin Colombet <qcolombet@apple.com> | 2016-04-26 23:14:24 +0000 |
|---|---|---|
| committer | Quentin Colombet <qcolombet@apple.com> | 2016-04-26 23:14:24 +0000 |
| commit | 3f192450151f4ed9eb656037193651781adf7d41 (patch) | |
| tree | 95027b150ccd86a0c121a3f1e932196483d534bb /llvm/test | |
| parent | 053c2a6f25e48132d8f66bd73f3575da47cfde88 (diff) | |
| download | bcm5719-llvm-3f192450151f4ed9eb656037193651781adf7d41.tar.gz bcm5719-llvm-3f192450151f4ed9eb656037193651781adf7d41.zip | |
[MachineInstrBundle] Improvement the recognition of dead definitions.
Now, it is possible to know that partial definitions are dead definitions and
recognize that clobbered registers are also dead.
llvm-svn: 267621
Diffstat (limited to 'llvm/test')
| -rw-r--r-- | llvm/test/CodeGen/X86/cmpxchg-clobber-flags.ll | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/llvm/test/CodeGen/X86/cmpxchg-clobber-flags.ll b/llvm/test/CodeGen/X86/cmpxchg-clobber-flags.ll index 6f54a0435f8..74599cbdc17 100644 --- a/llvm/test/CodeGen/X86/cmpxchg-clobber-flags.ll +++ b/llvm/test/CodeGen/X86/cmpxchg-clobber-flags.ll @@ -63,11 +63,10 @@ define i64 @test_intervening_call(i64* %foo, i64 %bar, i64 %baz) { ; x8664-sahf-NEXT: popq %rax ; x8664-sahf-NEXT: movq %rax, %rdi ; x8664-sahf-NEXT: callq bar -; x8664-sahf-NEXT: pushq %rax +; RAX is dead, no need to push and pop it. ; x8664-sahf-NEXT: movq [[FLAGS]], %rax ; x8664-sahf-NEXT: addb $127, %al ; x8664-sahf-NEXT: sahf -; x8664-sahf-NEXT: popq %rax ; x8664-sahf-NEXT: jne %cx = cmpxchg i64* %foo, i64 %bar, i64 %baz seq_cst seq_cst |
