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authorRamana Radhakrishnan <ramana.radhakrishnan@arm.com>2009-08-24 09:03:35 +0000
committerRamana Radhakrishnan <ramana@gcc.gnu.org>2009-08-24 09:03:35 +0000
commit3e2d9dcfa8d8a0bbb136b569e91a2c0687c930c7 (patch)
tree8ae627b9aadc4ebbe7fd0082ea16a0de542345e7 /gcc/config
parent54f52b81641ce93ebb60a8d62f09ece24b1fa946 (diff)
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combine cmps with shifts
2009-08-24 Ramana Radhakrishnan <ramana.radhakrishnan@arm.com> * gcc.target/arm/combine-cmp-shift.c: New test. 2009-08-24 Ramana Radhakrishnan <ramana.radhakrishnan@arm.com> * config/arm/arm.c (arm_select_cc_mode): Handle subreg. From-SVN: r151050
Diffstat (limited to 'gcc/config')
-rw-r--r--gcc/config/arm/arm.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c
index 3c7e67e..0d53896 100644
--- a/gcc/config/arm/arm.c
+++ b/gcc/config/arm/arm.c
@@ -9504,7 +9504,8 @@ arm_select_cc_mode (enum rtx_code op, rtx x, rtx y)
/* A compare with a shifted operand. Because of canonicalization, the
comparison will have to be swapped when we emit the assembler. */
- if (GET_MODE (y) == SImode && GET_CODE (y) == REG
+ if (GET_MODE (y) == SImode
+ && (REG_P (y) || (GET_CODE (y) == SUBREG))
&& (GET_CODE (x) == ASHIFT || GET_CODE (x) == ASHIFTRT
|| GET_CODE (x) == LSHIFTRT || GET_CODE (x) == ROTATE
|| GET_CODE (x) == ROTATERT))
@@ -9512,7 +9513,8 @@ arm_select_cc_mode (enum rtx_code op, rtx x, rtx y)
/* This operation is performed swapped, but since we only rely on the Z
flag we don't need an additional mode. */
- if (GET_MODE (y) == SImode && REG_P (y)
+ if (GET_MODE (y) == SImode
+ && (REG_P (y) || (GET_CODE (y) == SUBREG))
&& GET_CODE (x) == NEG
&& (op == EQ || op == NE))
return CC_Zmode;