[Bug target/63891] New: [5.0 regression] Failure of darwin-weakimport-3.c

[fxcoudert at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63891

            Bug ID: 63891
           Summary: [5.0 regression] Failure of darwin-weakimport-3.c
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: fxcoudert at gcc dot gnu.org

Current trunk shows runtime failure for gcc.dg/darwin-weakimport-3.c on
x86_64-apple-darwin14 with -m32. The difference in the assembler between the
4.9.2 compiler (good) and the trunk compiler (bad, revision 217599) is:

$ diff -pu good-49.s bad-trunk.s 
--- good-49.s    2014-11-15 16:33:50.000000000 +0100
+++ bad-trunk.s    2014-11-15 16:33:30.000000000 +0100
@@ -3,6 +3,15 @@
 _foo:
     pushl    %ebp
     movl    %esp, %ebp
+    call    ___x86.get_pc_thunk.ax
+L1$pb:
+    nop
     popl    %ebp
     ret
+    .section __TEXT,__textcoal_nt,coalesced,pure_instructions
+    .weak_definition    ___x86.get_pc_thunk.ax
+    .private_extern    ___x86.get_pc_thunk.ax
+___x86.get_pc_thunk.ax:
+    movl    (%esp), %eax
+    ret
     .subsections_via_symbols


The presence of the line with "coalesced" makes the test fail.