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-rw-r--r--llvm/test/CodeGen/AMDGPU/subreg-intervals.mir51
1 files changed, 51 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/AMDGPU/subreg-intervals.mir b/llvm/test/CodeGen/AMDGPU/subreg-intervals.mir
new file mode 100644
index 00000000000..c4e00215159
--- /dev/null
+++ b/llvm/test/CodeGen/AMDGPU/subreg-intervals.mir
@@ -0,0 +1,51 @@
+# RUN: llc -march=amdgcn -run-pass liveintervals -debug-only=regalloc -o /dev/null %s 2>&1 | FileCheck %s
+# REQUIRES: asserts
+
+# CHECK: INTERVALS
+# CHECK: vreg0
+# CHECK-LABEL: Machine code for function test0:
+
+# CHECK: INTERVALS
+# CHECK: vreg0
+# CHECK-LABEL: Machine code for function test1:
+
+--- |
+ define void @test0() { ret void }
+ define void @test1() { ret void }
+...
+---
+name: test0
+registers:
+ - { id: 0, class: sreg_64 }
+body: |
+ bb.0:
+ S_NOP 0, implicit-def %0
+ S_NOP 0, implicit %0
+
+ S_NOP 0, implicit-def undef %0.sub0
+ S_NOP 0, implicit %0
+...
+---
+name: test1
+registers:
+ - { id: 0, class: sreg_64 }
+body: |
+ bb.0:
+ successors: %bb.1, %bb.2
+ S_CBRANCH_VCCNZ %bb.1, implicit undef %vcc
+ S_BRANCH %bb.2
+
+ bb.1:
+ successors: %bb.3
+ S_NOP 0, implicit-def undef %0.sub0
+ S_BRANCH %bb.3
+
+ bb.2:
+ successors: %bb.3
+ S_NOP 0, implicit-def %0
+ S_BRANCH %bb.3
+
+ bb.3:
+ S_NOP 0
+ S_NOP 0, implicit %0
+...
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