diff options
| author | Matthias Braun <matze@braunis.de> | 2016-11-10 21:22:47 +0000 |
|---|---|---|
| committer | Matthias Braun <matze@braunis.de> | 2016-11-10 21:22:47 +0000 |
| commit | 2821987cf309b5f01c994a7bb47d0c2898d2f06b (patch) | |
| tree | 2d5bacc1b9c8b01a19af8130dcef6aca27ac0028 /test/CodeGen/AArch64/machine_cse_impdef_killflags.ll | |
| parent | a2ee7d29910809cb1f8a4ed0509c343781082d67 (diff) | |
RegisterCoalescer: Ignore interferences for constant physregs
When copying to/from a constant register interferences can be ignored.
Also update the documentation for isConstantPhysReg() to make it more
obvious that this transformation is valid.
Differential Revision: https://reviews.llvm.org/D26106
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@286503 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/AArch64/machine_cse_impdef_killflags.ll')
| -rw-r--r-- | test/CodeGen/AArch64/machine_cse_impdef_killflags.ll | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/test/CodeGen/AArch64/machine_cse_impdef_killflags.ll b/test/CodeGen/AArch64/machine_cse_impdef_killflags.ll index e77824f5f14..a3ee2b0069c 100644 --- a/test/CodeGen/AArch64/machine_cse_impdef_killflags.ll +++ b/test/CodeGen/AArch64/machine_cse_impdef_killflags.ll @@ -5,12 +5,11 @@ ; The verifier would complain otherwise. define i64 @csed-impdef-killflag(i64 %a) { ; CHECK-LABEL: csed-impdef-killflag -; CHECK-DAG: mov [[REG0:w[0-9]+]], wzr ; CHECK-DAG: orr [[REG1:w[0-9]+]], wzr, #0x1 ; CHECK-DAG: orr [[REG2:x[0-9]+]], xzr, #0x2 ; CHECK-DAG: orr [[REG3:x[0-9]+]], xzr, #0x3 ; CHECK: cmp x0, #0 -; CHECK-DAG: csel w[[SELECT_WREG_1:[0-9]+]], [[REG0]], [[REG1]], ne +; CHECK-DAG: csel w[[SELECT_WREG_1:[0-9]+]], wzr, [[REG1]], ne ; CHECK-DAG: csel [[SELECT_XREG_2:x[0-9]+]], [[REG2]], [[REG3]], ne ; CHECK: ubfx [[SELECT_XREG_1:x[0-9]+]], x[[SELECT_WREG_1]], #0, #32 ; CHECK-NEXT: add x0, [[SELECT_XREG_2]], [[SELECT_XREG_1]] |