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-rw-r--r--llvm/test/CodeGen/AArch64/GlobalISel/legalize-ext-cse.mir21
1 files changed, 21 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/AArch64/GlobalISel/legalize-ext-cse.mir b/llvm/test/CodeGen/AArch64/GlobalISel/legalize-ext-cse.mir
new file mode 100644
index 00000000000..92980dcfc9b
--- /dev/null
+++ b/llvm/test/CodeGen/AArch64/GlobalISel/legalize-ext-cse.mir
@@ -0,0 +1,21 @@
+# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
+# RUN: llc -march=aarch64 -run-pass=legalizer %s -o - -enable-cse-in-legalizer=1 -O1 | FileCheck %s
+---
+name: test_cse_in_legalizer
+body: |
+ bb.0.entry:
+ ; CHECK-LABEL: name: test_cse_in_legalizer
+ ; CHECK: [[COPY:%[0-9]+]]:_(s64) = COPY $x0
+ ; CHECK: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 255
+ ; CHECK: [[TRUNC:%[0-9]+]]:_(s32) = G_TRUNC [[COPY]](s64)
+ ; CHECK: [[AND:%[0-9]+]]:_(s32) = G_AND [[TRUNC]], [[C]]
+ ; CHECK: [[COPY1:%[0-9]+]]:_(s32) = COPY [[AND]](s32)
+ ; CHECK: $w0 = COPY [[COPY1]](s32)
+ ; CHECK: $w0 = COPY [[AND]](s32)
+ %0:_(s64) = COPY $x0
+ %1:_(s8) = G_TRUNC %0(s64)
+ %19:_(s32) = G_ZEXT %1(s8)
+ $w0 = COPY %19(s32)
+ %2:_(s8) = G_TRUNC %0(s64)
+ %20:_(s32) = G_ZEXT %2(s8)
+ $w0 = COPY %20(s32)