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| author | Bill Wendling <isanbard@gmail.com> | 2010-11-01 20:41:43 +0000 |
|---|---|---|
| committer | Bill Wendling <isanbard@gmail.com> | 2010-11-01 20:41:43 +0000 |
| commit | c6627eec1364141d1ca61ec342a70b0cd152072d (patch) | |
| tree | 5df82bc9ee09f0e1f9dd43ee53005996a48b6d84 /llvm/test/CodeGen/ARM/long_shift.ll | |
| parent | ab9c1dd9ba7d8c21de0cda5a21b0b94bec484f71 (diff) | |
| download | bcm5719-llvm-c6627eec1364141d1ca61ec342a70b0cd152072d.tar.gz bcm5719-llvm-c6627eec1364141d1ca61ec342a70b0cd152072d.zip | |
When we look at instructions to convert to setting the 's' flag, we need to look
at more than those which define CPSR. You can have this situation:
(1) subs ...
(2) sub r6, r5, r4
(3) movge ...
(4) cmp r6, 0
(5) movge ...
We cannot convert (2) to "subs" because (3) is using the CPSR set by
(1). There's an analogous situation here:
(1) sub r1, r2, r3
(2) sub r4, r5, r6
(3) cmp r4, ...
(5) movge ...
(6) cmp r1, ...
(7) movge ...
We cannot convert (1) to "subs" because of the intervening use of CPSR.
llvm-svn: 117950
Diffstat (limited to 'llvm/test/CodeGen/ARM/long_shift.ll')
| -rw-r--r-- | llvm/test/CodeGen/ARM/long_shift.ll | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/llvm/test/CodeGen/ARM/long_shift.ll b/llvm/test/CodeGen/ARM/long_shift.ll index 45ed2099c95..5e4f5730f8d 100644 --- a/llvm/test/CodeGen/ARM/long_shift.ll +++ b/llvm/test/CodeGen/ARM/long_shift.ll @@ -1,6 +1,4 @@ ; RUN: llc < %s -march=arm | FileCheck %s -; XFAIL: * -; FIXME: Fix after peephole optimizer is fixed. define i64 @f0(i64 %A, i64 %B) { ; CHECK: f0 |
