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| author | Hal Finkel <hfinkel@anl.gov> | 2013-04-09 17:27:09 +0000 |
|---|---|---|
| committer | Hal Finkel <hfinkel@anl.gov> | 2013-04-09 17:27:09 +0000 |
| commit | f6f8198d85f278ff03aaf32c9db6ae0b3826395c (patch) | |
| tree | b5b4e76c738f25c5402e812080d5af875f3edc55 /test/CodeGen/PowerPC/2007-09-07-LoadStoreIdxForms.ll | |
| parent | 307b8535ee4cb37ade40fdc7dd36baa7f27fa34c (diff) | |
| download | llvm-f6f8198d85f278ff03aaf32c9db6ae0b3826395c.tar.gz llvm-f6f8198d85f278ff03aaf32c9db6ae0b3826395c.tar.bz2 llvm-f6f8198d85f278ff03aaf32c9db6ae0b3826395c.tar.xz | |
Use virtual base registers on PPC
On PowerPC, non-vector loads and stores have r+i forms; however, in functions
with large stack frames these were not being used to access slots far from the
stack pointer because such slots were out of range for the signed 16-bit
immediate offset field. This increases register pressure because we need a
separate register for each offset (when the r+r form is used). By enabling
virtual base registers, we can deal with large stack frames without unduly
increasing register pressure.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179105 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/PowerPC/2007-09-07-LoadStoreIdxForms.ll')
| -rw-r--r-- | test/CodeGen/PowerPC/2007-09-07-LoadStoreIdxForms.ll | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/test/CodeGen/PowerPC/2007-09-07-LoadStoreIdxForms.ll b/test/CodeGen/PowerPC/2007-09-07-LoadStoreIdxForms.ll index 40f46fda46..ba5c8c172f 100644 --- a/test/CodeGen/PowerPC/2007-09-07-LoadStoreIdxForms.ll +++ b/test/CodeGen/PowerPC/2007-09-07-LoadStoreIdxForms.ll @@ -1,5 +1,9 @@ ; RUN: llc < %s -march=ppc64 | FileCheck %s +; Temporarily XFAIL this test until LSA stops creating single-use +; virtual base registers. +; XFAIL: * + %struct.__db_region = type { %struct.__mutex_t, [4 x i8], %struct.anon, i32, [1 x i32] } %struct.__mutex_t = type { i32 } %struct.anon = type { i64, i64 } |