diff options
Diffstat (limited to 'test/CodeGen/X86/2011-09-14-valcoalesce.ll')
| -rw-r--r-- | test/CodeGen/X86/2011-09-14-valcoalesce.ll | 37 |
1 files changed, 31 insertions, 6 deletions
diff --git a/test/CodeGen/X86/2011-09-14-valcoalesce.ll b/test/CodeGen/X86/2011-09-14-valcoalesce.ll index 6d91109daa..4e84e84c1a 100644 --- a/test/CodeGen/X86/2011-09-14-valcoalesce.ll +++ b/test/CodeGen/X86/2011-09-14-valcoalesce.ll @@ -14,22 +14,47 @@ ; Prior to fixing PR10920 401.bzip miscompile, the coalescer would ; consider vreg1 and vreg27 to be copies of the same value. It would ; then remove one of the critical edge copes, which cannot safely be removed. -; + +; There are two obvious ways the register-allocator could go here, either +; reusing the pre-addition register later, or the post-addition one. Currently, +; it does the latter, so we check: + ; CHECK: # %while.body85.i ; CHECK-NOT: # % ; CHECK-NOT: add ; CHECK: movl %[[POSTR:e[abcdxi]+]], %[[PRER:e[abcdxi]+]] ; CHECK: addl %{{.*}}, %[[POSTR]] ; CHECK: # %while.end.i -; CHECK: movl %[[POSTR]], %[[USER:e[abcdxi]+]] +; CHECK-NOT: movl %[[POSTR]] ; CHECK: # %land.lhs.true.i -; CHECK: movl %[[POSTR]], %[[USER]] +; CHECK-NOT: movl %[[POSTR]] ; CHECK: # %land.lhs.true103.i -; CHECK: movl %[[POSTR]], %[[USER]] +; CHECK-NOT: movl %[[POSTR]] ; CHECK: # %if.then108.i -; [[PRER] live out, so nothing on this path should define it. -; CHECK-NOT: , %[[PRER]] +; CHECK: movl %[[PRER]], %[[POSTR]] ; CHECK: # %if.end117.i +; and use it for fprintf: +; CHECK: movl %[[POSTR]], 12(%esp) + + +; If it ever reverts to reusing the pre-addition register then we should +; *probably* check this instead (it certainly worked last time): + +; CHECKALT: # %while.body85.i +; CHECKALT-NOT: # % +; CHECKALT-NOT: add +; CHECKALT: movl %[[POSTR:e[abcdxi]+]], %[[PRER:e[abcdxi]+]] +; CHECKALT: addl %{{.*}}, %[[POSTR]] +; CHECKALT: # %while.end.i +; CHECKALT: movl %[[POSTR]], %[[USER:e[abcdxi]+]] +; CHECKALT: # %land.lhs.true.i +; CHECKALT: movl %[[POSTR]], %[[USER]] +; CHECKALT: # %land.lhs.true103.i +; CHECKALT: movl %[[POSTR]], %[[USER]] +; CHECKALT: # %if.then108.i +; [[PRER] live out, so nothing on this path should define it. +; CHECKALT-NOT: , %[[PRER]] +; CHECKALT: # %if.end117.i target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128-n8:16:32" |