[Bug target/100163] -falign-loops sometimes produces invalid code for SH-2
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100163 Andrew Pinski changed: What|Removed |Added Resolution|--- |INVALID Status|WAITING |RESOLVED --- Comment #3 from Andrew Pinski --- Yes this is not a bug. You can't use .align in the data section and expect nops to happen. You marking a function in the data section makes this invalid. See https://sourceware.org/binutils/docs-2.36/as/Align.html#Align "However, on most systems, if the section is marked as containing code and the fill value is omitted, the space is filled with no-op instructions." GCC is assuming you are using a section which is marked as containing code which .data is not one of those sections.
[Bug target/100163] -falign-loops sometimes produces invalid code for SH-2
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100163 --- Comment #2 from Victor Luchitz --- Here's relevant -S output for -O2: ... sub r1,r15 .align 2 .L186: mov.w @r2,r0 extu.w r0,r4 And for -O2 -fno-align-loops: ... sub r1,r15 .L186: mov.w @r2,r0 extu.w r0,r4 I'm not sure what's workarounds are available for an end user here other than to explicitly disable all kinds of alignments.
[Bug target/100163] -falign-loops sometimes produces invalid code for SH-2
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100163 Andrew Pinski changed: What|Removed |Added Status|UNCONFIRMED |WAITING Ever confirmed|0 |1 Last reconfirmed||2021-04-20 --- Comment #1 from Andrew Pinski --- >relocating functions to .data segment This is more likely an assembly issue or rather an user issue. .align inside the text section uses nops but inside non-text sections uses 0s. What does GCC output -S show?
