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[Bug rtl-optimization/38644] Optimization flag -O1 -fschedule-insns2 causes wrong code
- From: "sebastian dot huber at embedded-brains dot de" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 12 Aug 2010 08:19:05 -0000
- Subject: [Bug rtl-optimization/38644] Optimization flag -O1 -fschedule-insns2 causes wrong code
- References: <bug-38644-17122@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #18 from sebastian dot huber at embedded-brains dot de 2010-08-12 08:19 -------
This bug is still present in GCC 4.6.0 20100807 (arm-eabi-gcc -O1
-fschedule-insns2 -mthumb):
readStream:
push {r4, lr}
sub sp, sp, #8
mov r4, sp
mov r3, #0
strb r3, [r4, #7]
add r4, r4, #7
ldr r3, [r0]
mov r1, r4
mov r2, #1
bl doStreamReadBlock
add sp, sp, #8
ldrb r0, [r4]
@ sp needed for prologue
pop {r4}
pop {r1}
bx r1
.size readStream, .-readStream
.ident "GCC: (GNU) 4.6.0 20100807 (experimental)"
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38644