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-rw-r--r--test/CodeGen/AArch64/ldst-opt.mir26
1 files changed, 20 insertions, 6 deletions
diff --git a/test/CodeGen/AArch64/ldst-opt.mir b/test/CodeGen/AArch64/ldst-opt.mir
index 8f0b71be3483..85b655b717ca 100644
--- a/test/CodeGen/AArch64/ldst-opt.mir
+++ b/test/CodeGen/AArch64/ldst-opt.mir
@@ -1,10 +1,4 @@
# RUN: llc -mtriple=aarch64--linux-gnu -run-pass=aarch64-ldst-opt %s -verify-machineinstrs -o - 2>&1 | FileCheck %s
---- |
- define void @promote-load-from-store() { ret void }
- define void @store-pair() { ret void }
- define void @store-pair-clearkill0() { ret void }
- define void @store-pair-clearkill1() { ret void }
-...
---
name: promote-load-from-store
tracksRegLiveness: true
@@ -130,3 +124,23 @@ body: |
# CHECK-NOT: %w2 = COPY killed %w1
# CHECK: %w2 = COPY %w1
# CHECK: STPWi %w1, killed %w2, killed %x0, 0
+---
+name: store-load-clearkill
+tracksRegLiveness: true
+body: |
+ bb.0:
+ liveins: %w1
+
+ STRWui %w1, %sp, 0 :: (store 4)
+ %wzr = COPY killed %w1 ; killing use of %w1
+ %w11 = LDRWui %sp, 0 :: (load 4)
+ HINT 0, implicit %w11 ; some use of %w11
+...
+# When replaceing the load of a store-load pair with a copy the kill flags
+# along the way need to be cleared.
+# CHECK-LABEL: name: store-load-clearkill
+# CHECK: STRWui %w1, %sp, 0 :: (store 4)
+# CHECK-NOT: COPY killed %w1
+# CHECK: %wzr = COPY %w1
+# CHECK: %w11 = ORRWrs %wzr, %w1, 0
+# CHECK: HINT 0, implicit %w11