70 lines
1.6 KiB
LLVM
70 lines
1.6 KiB
LLVM
; 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}
|