diff options
Diffstat (limited to 'test/Transforms/InstCombine/canonicalize_branch.ll')
| -rw-r--r-- | test/Transforms/InstCombine/canonicalize_branch.ll | 31 |
1 files changed, 28 insertions, 3 deletions
diff --git a/test/Transforms/InstCombine/canonicalize_branch.ll b/test/Transforms/InstCombine/canonicalize_branch.ll index 24090ab..869546d 100644 --- a/test/Transforms/InstCombine/canonicalize_branch.ll +++ b/test/Transforms/InstCombine/canonicalize_branch.ll @@ -1,8 +1,23 @@ ; RUN: opt < %s -instcombine -S | FileCheck %s +; Test an already canonical branch to make sure we don't flip those. +define i32 @test0(i32 %X, i32 %Y) { + %C = icmp eq i32 %X, %Y + br i1 %C, label %T, label %F, !prof !0 + +; CHECK: @test0 +; CHECK: %C = icmp eq i32 %X, %Y +; CHECK: br i1 %C, label %T, label %F + +T: + ret i32 12 +F: + ret i32 123 +} + define i32 @test1(i32 %X, i32 %Y) { %C = icmp ne i32 %X, %Y - br i1 %C, label %T, label %F + br i1 %C, label %T, label %F, !prof !1 ; CHECK: @test1 ; CHECK: %C = icmp eq i32 %X, %Y @@ -16,7 +31,7 @@ F: define i32 @test2(i32 %X, i32 %Y) { %C = icmp ule i32 %X, %Y - br i1 %C, label %T, label %F + br i1 %C, label %T, label %F, !prof !2 ; CHECK: @test2 ; CHECK: %C = icmp ugt i32 %X, %Y @@ -30,7 +45,7 @@ F: define i32 @test3(i32 %X, i32 %Y) { %C = icmp uge i32 %X, %Y - br i1 %C, label %T, label %F + br i1 %C, label %T, label %F, !prof !3 ; CHECK: @test3 ; CHECK: %C = icmp ult i32 %X, %Y @@ -42,3 +57,13 @@ F: ret i32 123 } +!0 = metadata !{metadata !"branch_weights", i32 1, i32 2} +!1 = metadata !{metadata !"branch_weights", i32 3, i32 4} +!2 = metadata !{metadata !"branch_weights", i32 5, i32 6} +!3 = metadata !{metadata !"branch_weights", i32 7, i32 8} +; Base case shouldn't change. +; CHECK: !0 = {{.*}} i32 1, i32 2} +; Ensure that the branch metadata is reversed to match the reversals above. +; CHECK: !1 = {{.*}} i32 4, i32 3} +; CHECK: !2 = {{.*}} i32 6, i32 5} +; CHECK: !3 = {{.*}} i32 8, i32 7} |