[Hexagon] Simplify CFG after atomic expansion

This will remove suboptimal branching from the generated ll/sc loops.
The extra simplification pass affects a lot of testcases, which have
been modified to accommodate this change: either by modifying the
test to become immune to the CFG simplification, or (less preferablt)
by adding option -hexagon-initial-cfg-clenaup=0.

llvm-svn: 338774

1 files changed, 5 insertions, 5 deletions

diff --git a/llvm/test/CodeGen/Hexagon/autohvx/isel-concat-multiple.ll b/llvm/test/CodeGen/Hexagon/autohvx/isel-concat-multiple.ll
index 3cc73750164..67d8e6663cb 100644
--- a/llvm/test/CodeGen/Hexagon/autohvx/isel-concat-multiple.ll
+++ b/llvm/test/CodeGen/Hexagon/autohvx/isel-concat-multiple.ll
@@ -7,13 +7,13 @@
 target datalayout = "e-m:e-p:32:32:32-a:0-n16:32-i64:64:64-i32:32:32-i16:16:16-i1:8:8-f32:32:32-f64:64:64-v32:32:32-v64:64:64-v512:512:512-v1024:1024:1024-v2048:2048:2048"
 target triple = "hexagon"
 
-define void @fred() #0 {
+define void @fred(i32* %a0, i32* %a1, i8* %a2) #0 {
 b0:
-  %v1 = load i32, i32* undef, align 4
+  %v1 = load i32, i32* %a0, align 4
   %v2 = mul nsw i32 %v1, -15137
   %v3 = add nsw i32 0, %v2
   %v4 = sub nsw i32 0, %v3
-  %v5 = load i32, i32* undef, align 4
+  %v5 = load i32, i32* %a1, align 4
   %v6 = insertelement <2 x i32> undef, i32 %v5, i32 1
   %v7 = add nsw <2 x i32> undef, %v6
   %v8 = extractelement <2 x i32> %v7, i32 0
@@ -28,8 +28,8 @@ b0:
   %v17 = extractelement <8 x i32> %v16, i32 5
   %v18 = getelementptr inbounds i8, i8* null, i32 %v17
   %v19 = load i8, i8* %v18, align 1
-  store i8 %v19, i8* undef, align 1
-  unreachable
+  store i8 %v19, i8* %a2, align 1
+  ret void
 }
 
 attributes #0 = { nounwind "target-cpu"="hexagonv60" "target-features"="+hvx-length64b,+hvxv60" }