Do trivial CSE of dead BBs during codegen preparation.
Some BBs can become dead after codegen preparation. If we delete them here, it
could help enable tail-call optimizations later on.
<rdar://problem/10256573>
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152002 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/ARM/2011-03-15-LdStMultipleBug.ll b/test/CodeGen/ARM/2011-03-15-LdStMultipleBug.ll
index ccda281..2faa04a 100644
--- a/test/CodeGen/ARM/2011-03-15-LdStMultipleBug.ll
+++ b/test/CodeGen/ARM/2011-03-15-LdStMultipleBug.ll
@@ -1,4 +1,4 @@
-; RUN: llc < %s -mtriple=thumbv7-apple-darwin10 -relocation-model=pic -disable-fp-elim -mcpu=cortex-a8 | FileCheck %s
+; RUN: llc < %s -mtriple=thumbv7-apple-darwin10 -relocation-model=pic -disable-fp-elim -disable-cgp-delete-dead-blocks -mcpu=cortex-a8 | FileCheck %s
; Do not form Thumb2 ldrd / strd if the offset is not multiple of 4.
; rdar://9133587
diff --git a/test/CodeGen/ARM/cse-libcalls.ll b/test/CodeGen/ARM/cse-libcalls.ll
index 0dcf9dd..1d011be 100644
--- a/test/CodeGen/ARM/cse-libcalls.ll
+++ b/test/CodeGen/ARM/cse-libcalls.ll
@@ -4,7 +4,7 @@
; Without CSE of libcalls, there are two calls in the output instead of one.
-define i32 @u_f_nonbon(double %lambda) nounwind {
+define double @u_f_nonbon(double %lambda) nounwind {
entry:
%tmp19.i.i = load double* null, align 4 ; <double> [#uses=2]
%tmp6.i = fcmp olt double %tmp19.i.i, 1.000000e+00 ; <i1> [#uses=1]
@@ -26,5 +26,5 @@
br i1 false, label %bb.nph53.i, label %bb508.i
bb508.i: ; preds = %bb502.loopexit.i, %entry
- ret i32 1
+ ret double %tmp10.i4
}