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Unified Diff: tests_lit/llvm2ice_tests/loop-nest-depth.ll

Issue 1318553003: Compute the loop nest depth of each CfgNode and weight Variables by it. (Closed) Base URL: https://chromium.googlesource.com/native_client/pnacl-subzero.git@master
Patch Set: Created 5 years, 3 months ago
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Index: tests_lit/llvm2ice_tests/loop-nest-depth.ll
diff --git a/tests_lit/llvm2ice_tests/loop-nest-depth.ll b/tests_lit/llvm2ice_tests/loop-nest-depth.ll
new file mode 100644
index 0000000000000000000000000000000000000000..0b0ace4e2760d8a0e3db715f3817fb9e1a9f037f
--- /dev/null
+++ b/tests_lit/llvm2ice_tests/loop-nest-depth.ll
@@ -0,0 +1,232 @@
+; Test the the loop nest depth is correctly calculated for basic blocks.
+
+; REQUIRES: allow_dump
+
+; Single threaded so that the dumps used for checking happen in order
+; RUN: %p2i --filetype=obj --disassemble -i %s --args -O2 --verbose=loop \
+; RUN: --verbose=inst --threads=0 | FileCheck %s
+
+define void @test_single_loop(i32 %a32) {
+entry:
+ %a = trunc i32 %a32 to i1
+ br label %loop0
+
+loop0: ; <-+
+ br label %loop1 ; |
+loop1: ; |
+ br i1 %a, label %loop0, label %out ; --+
+
+out:
+ ret void
+}
+
+; CHECK-LABEL: After loop nest depth analysis
+; CHECK: entry: // LoopNestDepth = 0
+; CHECK: loop0: // LoopNestDepth = 1
+; CHECK: loop1: // LoopNestDepth = 1
+; CHECK: out: // LoopNestDepth = 0
+; CHECK-LABEL: Before RMW
+
+define void @test_single_loop_with_continue(i32 %a32, i32 %b32) {
+entry:
+ %a = trunc i32 %a32 to i1
+ %b = trunc i32 %b32 to i1
+ br label %loop0
+
+loop0: ; <-+
+ br label %loop1 ; |
+loop1: ; |
+ br i1 %a, label %loop0, label %loop2 ; --+
+loop2: ; |
+ br i1 %b, label %loop0, label %out ; --+
+
+out:
+ ret void
+}
+
+; CHECK-LABEL: After loop nest depth analysis
+; CHECK: entry: // LoopNestDepth = 0
+; CHECK: loop0: // LoopNestDepth = 1
+; CHECK: loop1: // LoopNestDepth = 1
+; CHECK: loop2: // LoopNestDepth = 1
+; CHECK: out: // LoopNestDepth = 0
+; CHECK-LABEL: Before RMW
+
+define void @test_multiple_exits(i32 %a32, i32 %b32) {
+entry:
+ %a = trunc i32 %a32 to i1
+ %b = trunc i32 %b32 to i1
+ br label %loop0
+
+loop0: ; <-+
+ br label %loop1 ; |
+loop1: ; |
+ br i1 %a, label %loop2, label %out ; --+-+
+loop2: ; | |
+ br i1 %b, label %loop0, label %out ; --+ |
+ ; |
+out: ; <---+
+ ret void
+}
+
+; CHECK-LABEL: After loop nest depth analysis
+; CHECK: entry: // LoopNestDepth = 0
+; CHECK: loop0: // LoopNestDepth = 1
+; CHECK: loop1: // LoopNestDepth = 1
+; CHECK: loop2: // LoopNestDepth = 1
+; CHECK: out: // LoopNestDepth = 0
+; CHECK-LABEL: Before RMW
+
+define void @test_two_nested_loops(i32 %a32, i32 %b32) {
+entry:
+ %a = trunc i32 %a32 to i1
+ %b = trunc i32 %b32 to i1
+ br label %loop0_0
+
+loop0_0: ; <---+
+ br label %loop1_0 ; |
+loop1_0: ; <-+ |
+ br label %loop1_1 ; | |
+loop1_1: ; | |
+ br i1 %a, label %loop1_0, label %loop0_1 ; --+ |
+loop0_1: ; |
+ br i1 %b, label %loop0_0, label %out ; ----+
+
+out:
+ ret void
+}
+
+; CHECK-LABEL: After loop nest depth analysis
+; CHECK: entry: // LoopNestDepth = 0
+; CHECK: loop0_0: // LoopNestDepth = 1
+; CHECK: loop1_0: // LoopNestDepth = 2
+; CHECK: loop1_1: // LoopNestDepth = 2
+; CHECK: loop0_1: // LoopNestDepth = 1
+; CHECK: out: // LoopNestDepth = 0
+; CHECK-LABEL: Before RMW
+
+define void @test_two_nested_loops_with_continue(i32 %a32, i32 %b32, i32 %c32) {
+entry:
+ %a = trunc i32 %a32 to i1
+ %b = trunc i32 %b32 to i1
+ %c = trunc i32 %c32 to i1
+ br label %loop0_0
+
+loop0_0: ; <---+
+ br label %loop1_0 ; |
+loop1_0: ; <-+ |
+ br label %loop1_1 ; | |
+loop1_1: ; | |
+ br i1 %a, label %loop1_0, label %loop1_2 ; --+ |
+loop1_2: ; | |
+ br i1 %a, label %loop1_0, label %loop0_1 ; --+ |
+loop0_1: ; |
+ br i1 %b, label %loop0_0, label %out ; ----+
+
+out:
+ ret void
+}
+
+; CHECK-LABEL: After loop nest depth analysis
+; CHECK: entry: // LoopNestDepth = 0
+; CHECK: loop0_0: // LoopNestDepth = 1
+; CHECK: loop1_0: // LoopNestDepth = 2
+; CHECK: loop1_1: // LoopNestDepth = 2
+; CHECK: loop1_2: // LoopNestDepth = 2
+; CHECK: loop0_1: // LoopNestDepth = 1
+; CHECK: out: // LoopNestDepth = 0
+; CHECK-LABEL: Before RMW
+
+define void @test_multiple_nested_loops(i32 %a32, i32 %b32) {
+entry:
+ %a = trunc i32 %a32 to i1
+ %b = trunc i32 %b32 to i1
+ br label %loop0_0
+
+loop0_0: ; <---+
+ br label %loop1_0 ; |
+loop1_0: ; <-+ |
+ br label %loop1_1 ; | |
+loop1_1: ; | |
+ br i1 %a, label %loop1_0, label %loop0_1 ; --+ |
+loop0_1: ; |
+ br label %loop2_0 ; |
+loop2_0: ; <-+ |
+ br label %loop2_1 ; | |
+loop2_1: ; | |
+ br i1 %a, label %loop2_0, label %loop0_2 ; --+ |
+loop0_2: ; |
+ br i1 %b, label %loop0_0, label %out ; ----+
+
+out:
+ ret void
+}
+
+; CHECK-LABEL: After loop nest depth analysis
+; CHECK: entry: // LoopNestDepth = 0
+; CHECK: loop0_0: // LoopNestDepth = 1
+; CHECK: loop1_0: // LoopNestDepth = 2
+; CHECK: loop1_1: // LoopNestDepth = 2
+; CHECK: loop0_1: // LoopNestDepth = 1
+; CHECK: loop2_0: // LoopNestDepth = 2
+; CHECK: loop2_1: // LoopNestDepth = 2
+; CHECK: loop0_2: // LoopNestDepth = 1
+; CHECK: out: // LoopNestDepth = 0
+; CHECK-LABEL: Before RMW
+
+define void @test_three_nested_loops(i32 %a32, i32 %b32, i32 %c32) {
+entry:
+ %a = trunc i32 %a32 to i1
+ %b = trunc i32 %b32 to i1
+ %c = trunc i32 %c32 to i1
+ br label %loop0_0
+
+loop0_0: ; <-----+
+ br label %loop1_0 ; |
+loop1_0: ; <---+ |
+ br label %loop2_0 ; | |
+loop2_0: ; <-+ | |
+ br label %loop2_1 ; | | |
+loop2_1: ; | | |
+ br i1 %a, label %loop2_0, label %loop1_1 ; --+ | |
+loop1_1: ; | |
+ br i1 %b, label %loop1_0, label %loop0_1 ; ----+ |
+loop0_1: ; |
+ br i1 %c, label %loop0_0, label %out ; ------+
+
+out:
+ ret void
+}
+
+; CHECK-LABEL: After loop nest depth analysis
+; CHECK: entry: // LoopNestDepth = 0
+; CHECK: loop0_0: // LoopNestDepth = 1
+; CHECK: loop1_0: // LoopNestDepth = 2
+; CHECK: loop2_0: // LoopNestDepth = 3
+; CHECK: loop2_1: // LoopNestDepth = 3
+; CHECK: loop1_1: // LoopNestDepth = 2
+; CHECK: loop0_1: // LoopNestDepth = 1
+; CHECK: out: // LoopNestDepth = 0
+; CHECK-LABEL: Before RMW
+
+define void @test_diamond(i32 %a32) {
+entry:
+ %a = trunc i32 %a32 to i1
+ br i1 %a, label %left, label %right
+
+left:
+ br label %out
+
+right:
+ br label %out
+
+out:
+ ret void
+}
+
+; CHECK-LABEL: After loop nest depth analysis
+; CHECK: entry: // LoopNestDepth = 0
+; CHECK: left: // LoopNestDepth = 0
+; CHECK: right: // LoopNestDepth = 0
+; CHECK: out: // LoopNestDepth = 0
+; CHECK-LABEL: Before RMW
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