[llvm] e20b307 - [SCCP] Add additional multi-edge + phi tests (NFC)

[Nikita Popov via llvm-commits]

Author: Nikita Popov
Date: 2020-07-22T22:10:23+02:00
New Revision: e20b3079c14d8e68ebc90125eb95156f2e1ee9e4

URL: https://github.com/llvm/llvm-project/commit/e20b3079c14d8e68ebc90125eb95156f2e1ee9e4
DIFF: https://github.com/llvm/llvm-project/commit/e20b3079c14d8e68ebc90125eb95156f2e1ee9e4.diff

LOG: [SCCP] Add additional multi-edge + phi tests (NFC)

Added: 
    

Modified: 
    llvm/test/Transforms/SCCP/indirectbr.ll
    llvm/test/Transforms/SCCP/switch.ll

Removed: 
    


################################################################################
diff  --git a/llvm/test/Transforms/SCCP/indirectbr.ll b/llvm/test/Transforms/SCCP/indirectbr.ll
index 8953e4003292..6889282e3874 100644
--- a/llvm/test/Transforms/SCCP/indirectbr.ll
+++ b/llvm/test/Transforms/SCCP/indirectbr.ll
@@ -140,3 +140,27 @@ define i32 @indbrtest5_callee(i1 %c) {
   %r = call i32 @indbrtest5(i1 %c)
   ret i32 %r
 }
+
+define i32 @indbr_duplicate_successors_phi(i1 %c, i32 %x) {
+; CHECK-LABEL: @indbr_duplicate_successors_phi(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    br i1 [[C:%.*]], label [[INDBR:%.*]], label [[BB0:%.*]]
+; CHECK:       indbr:
+; CHECK-NEXT:    br label [[BB0]]
+; CHECK:       BB0:
+; CHECK-NEXT:    [[PHI:%.*]] = phi i32 [ [[X:%.*]], [[ENTRY:%.*]] ], [ 0, [[INDBR]] ]
+; CHECK-NEXT:    ret i32 [[PHI]]
+;
+entry:
+  br i1 %c, label %indbr, label %BB0
+
+indbr:
+  indirectbr i8* blockaddress(@indbr_duplicate_successors_phi, %BB0), [label %BB0, label %BB0, label %BB1]
+
+BB0:
+  %phi = phi i32 [ %x, %entry ], [ 0, %indbr ], [ 0, %indbr ]
+  ret i32 %phi
+
+BB1:
+  ret i32 0
+}

diff  --git a/llvm/test/Transforms/SCCP/switch.ll b/llvm/test/Transforms/SCCP/switch.ll
index 1d9c12b5c675..d895c5629cd4 100644
--- a/llvm/test/Transforms/SCCP/switch.ll
+++ b/llvm/test/Transforms/SCCP/switch.ll
@@ -50,6 +50,33 @@ end:
   ret i32 %phi
 }
 
+define i32 @test_duplicate_successors_phi_2(i1 %c, i32 %x) {
+; CHECK-LABEL: @test_duplicate_successors_phi_2(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    br i1 [[C:%.*]], label [[SWITCH:%.*]], label [[END:%.*]]
+; CHECK:       switch:
+; CHECK-NEXT:    br label [[END]]
+; CHECK:       end:
+; CHECK-NEXT:    [[PHI:%.*]] = phi i32 [ [[X:%.*]], [[ENTRY:%.*]] ], [ 1, [[SWITCH]] ]
+; CHECK-NEXT:    ret i32 [[PHI]]
+;
+entry:
+  br i1 %c, label %switch, label %end
+
+switch:
+  switch i32 0, label %switch.default [
+  i32 0, label %end
+  i32 1, label %end
+  ]
+
+switch.default:
+  ret i32 -1
+
+end:
+  %phi = phi i32 [ %x, %entry ], [ 1, %switch ], [ 1, %switch ]
+  ret i32 %phi
+}
+
 define i32 @test_local_range(i32 %x) {
 ; CHECK-LABEL: @test_local_range(
 ; CHECK-NEXT:    [[C:%.*]] = icmp ult i32 [[X:%.*]], 3