[llvm] af5df83 - [NFC] Add one test to verify the dependency brings by Macro-Fusion.

[QingShan Zhang via llvm-commits]

Author: QingShan Zhang
Date: 2019-11-11T06:54:26Z
New Revision: af5df83671bc4d94bddf33381430b6291d95a4fc

URL: https://github.com/llvm/llvm-project/commit/af5df83671bc4d94bddf33381430b6291d95a4fc
DIFF: https://github.com/llvm/llvm-project/commit/af5df83671bc4d94bddf33381430b6291d95a4fc.diff

LOG: [NFC] Add one test to verify the dependency brings by Macro-Fusion.

Added: 
    llvm/test/CodeGen/AArch64/macro-fusion.ll

Modified: 
    

Removed: 
    


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diff  --git a/llvm/test/CodeGen/AArch64/macro-fusion.ll b/llvm/test/CodeGen/AArch64/macro-fusion.ll
new file mode 100644
index 000000000000..97bca14df579
--- /dev/null
+++ b/llvm/test/CodeGen/AArch64/macro-fusion.ll
@@ -0,0 +1,23 @@
+; REQUIRES: asserts
+; RUN: llc < %s -mtriple=aarch64-linux-gnu -mattr=+fuse-arith-logic -verify-misched -debug-only=machine-scheduler 2>&1 > /dev/null | FileCheck %s
+
+; Verify that, the macro-fusion creates the necessary dependencies between SUs.
+define signext i32 @test(i32 signext %a, i32 signext %b, i32 signext %c, i32 signext %d) {
+entry:
+; CHECK: ********** MI Scheduling **********
+; CHECK-LABEL: %bb.0 entry 
+; CHECK: Macro fuse: SU([[SU4:[0-9]+]]) - SU([[SU5:[0-9]+]])
+; CHECK: Bind SU([[SU1:[0-9]+]]) - SU([[SU4]])
+; CHECK: Macro fuse: SU([[SU5]]) - SU([[SU6:[0-9]+]])
+; CHECK: Bind SU([[SU0:[0-9]+]]) - SU([[SU5]])
+; CHECK: SU([[SU0]]):   %{{[0-9]+}}:gpr32 = COPY $w3
+; CHECK: SU([[SU1]]):   %{{[0-9]+}}:gpr32 = COPY $w2
+; CHECK: SU([[SU4]]):   %{{[0-9]+}}:gpr32 = nsw ADDWrr
+; CHECK: SU([[SU5]]):   %{{[0-9]+}}:gpr32 = nsw ADDWrr
+; CHECK: SU([[SU6]]):   %{{[0-9]+}}:gpr32 = nsw SUBWrr
+
+  %add = add nsw i32 %b, %a
+  %add1 = add nsw i32 %add, %c
+  %sub = sub nsw i32 %add1, %d
+  ret i32 %sub
+}