; 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, !prof !1 | |
; CHECK: @test1 | |
; CHECK: %C = icmp eq i32 %X, %Y | |
; CHECK: br i1 %C, label %F, label %T | |
T: | |
ret i32 12 | |
F: | |
ret i32 123 | |
} | |
define i32 @test2(i32 %X, i32 %Y) { | |
%C = icmp ule i32 %X, %Y | |
br i1 %C, label %T, label %F, !prof !2 | |
; CHECK: @test2 | |
; CHECK: %C = icmp ugt i32 %X, %Y | |
; CHECK: br i1 %C, label %F, label %T | |
T: | |
ret i32 12 | |
F: | |
ret i32 123 | |
} | |
define i32 @test3(i32 %X, i32 %Y) { | |
%C = icmp uge i32 %X, %Y | |
br i1 %C, label %T, label %F, !prof !3 | |
; CHECK: @test3 | |
; CHECK: %C = icmp ult i32 %X, %Y | |
; CHECK: br i1 %C, label %F, label %T | |
T: | |
ret i32 12 | |
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} |