mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-13 20:32:21 +00:00
a85732fa3b
the input is already sign extended. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93019 91177308-0d34-0410-b5e6-96231b3b80d8
59 lines
1.3 KiB
LLVM
59 lines
1.3 KiB
LLVM
; 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
|
|
}
|