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; RUN: opt < %s -instcombine -S | FileCheck %s
define i32 @test1(i32 %X, i8 %A) {
%shift.upgrd.1 = zext i8 %A to i32 ; <i32> [#uses=1]
; can be logical shift.
%Y = ashr i32 %X, %shift.upgrd.1 ; <i32> [#uses=1]
%Z = and i32 %Y, 1 ; <i32> [#uses=1]
ret i32 %Z
; CHECK: @test1
; CHECK: lshr i32 %X, %shift.upgrd.1
}
define i32 @test2(i8 %tmp) {
%tmp3 = zext i8 %tmp to i32 ; <i32> [#uses=1]
%tmp4 = add i32 %tmp3, 7 ; <i32> [#uses=1]
%tmp5 = ashr i32 %tmp4, 3 ; <i32> [#uses=1]
ret i32 %tmp5
; CHECK: @test2
; CHECK: lshr i32 %tmp4, 3
}
define i64 @test3(i1 %X, i64 %Y, i1 %Cond) {
br i1 %Cond, label %T, label %F
T:
%X2 = sext i1 %X to i64
br label %C
F:
%Y2 = ashr i64 %Y, 63
br label %C
C:
%P = phi i64 [%X2, %T], [%Y2, %F]
%S = ashr i64 %P, 12
ret i64 %S
; CHECK: @test3
; CHECK: %P = phi i64
; CHECK-NEXT: ret i64 %P
}
define i64 @test4(i1 %X, i64 %Y, i1 %Cond) {
br i1 %Cond, label %T, label %F
T:
%X2 = sext i1 %X to i64
br label %C
F:
%Y2 = ashr i64 %Y, 63
br label %C
C:
%P = phi i64 [%X2, %T], [%Y2, %F]
%R = shl i64 %P, 12
%S = ashr i64 %R, 12
ret i64 %S
; CHECK: @test4
; CHECK: %P = phi i64
; CHECK-NEXT: ret i64 %P
}
; rdar://7732987
define i32 @test5(i32 %Y) {
br i1 undef, label %A, label %C
A:
br i1 undef, label %B, label %D
B:
br label %D
C:
br i1 undef, label %D, label %E
D:
%P = phi i32 [0, %A], [0, %B], [%Y, %C]
%S = ashr i32 %P, 16
ret i32 %S
; CHECK: @test5
; CHECK: %P = phi i32
; CHECK-NEXT: ashr i32 %P, 16
E:
ret i32 0
}
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