------- Comment #8 from jingyu at google dot com 2010-01-13 20:03 ------- Yes. This is a regression from 4.2.1. I have not tried 4.3.x. But at least, gcc-4.2.1 works correctly.
The following assembly is compiled out of gcc-4.2.1 with -mthumb -Os.  ldr r3, .L14+8 ldr r1, [r3] <--- load 0x0 ldr r2, [r3, #4] <--- load 0x07ff00000 ... str r1, [sp] str r2, [sp, #4] .L2: ldr r4, [r6] ldr r5, [r6, #4] ldr r2, [sp] <--- r2 = 0x0 ldr r3, [sp, #4] <--- r3 = 0x07ff00000 mov r0, r4 mov r1, r5 bl __aeabi_dcmpeq ... .L14: .word 0 .word 0 .word _ZZ3addPdS_E3C.0 .word _ZZ3addPdS_E3C.1 ... _ZZ3addPdS_E3C.0: .short 0 .short 0 .short 0 .short 32752 -- jingyu at google dot com changed: What |Removed |Added ---------------------------------------------------------------------------- AssignedTo|unassigned at gcc dot gnu |jingyu at google dot com |dot org | Status|NEW |ASSIGNED Known to work| |4.2.1 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42691