forked from OSchip/llvm-project
50 lines
1.3 KiB
LLVM
50 lines
1.3 KiB
LLVM
|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
|
||
|
|
; RUN: opt < %s -instcombine -S | FileCheck %s
|
||
|
|
|
||
|
|
define i64 @test1(i32 %x) nounwind {
|
||
|
|
; CHECK-LABEL: @test1(
|
||
|
|
; CHECK-NEXT: ret i64 0
|
||
|
|
;
|
||
|
|
%y = lshr i32 %x, 1
|
||
|
|
%r = udiv i32 %y, -1
|
||
|
|
%z = sext i32 %r to i64
|
||
|
|
ret i64 %z
|
||
|
|
}
|
||
|
|
define i64 @test2(i32 %x) nounwind {
|
||
|
|
; CHECK-LABEL: @test2(
|
||
|
|
; CHECK-NEXT: ret i64 0
|
||
|
|
;
|
||
|
|
%y = lshr i32 %x, 31
|
||
|
|
%r = udiv i32 %y, 3
|
||
|
|
%z = sext i32 %r to i64
|
||
|
|
ret i64 %z
|
||
|
|
}
|
||
|
|
|
||
|
|
; The udiv instructions shouldn't be optimized away, and the
|
||
|
|
; sext instructions should be optimized to zext.
|
||
|
|
|
||
|
|
define i64 @test1_PR2274(i32 %x, i32 %g) nounwind {
|
||
|
|
; CHECK-LABEL: @test1_PR2274(
|
||
|
|
; CHECK-NEXT: [[Y:%.*]] = lshr i32 %x, 30
|
||
|
|
; CHECK-NEXT: [[R:%.*]] = udiv i32 [[Y]], %g
|
||
|
|
; CHECK-NEXT: [[Z1:%.*]] = zext i32 [[R]] to i64
|
||
|
|
; CHECK-NEXT: ret i64 [[Z1]]
|
||
|
|
;
|
||
|
|
%y = lshr i32 %x, 30
|
||
|
|
%r = udiv i32 %y, %g
|
||
|
|
%z = sext i32 %r to i64
|
||
|
|
ret i64 %z
|
||
|
|
}
|
||
|
|
define i64 @test2_PR2274(i32 %x, i32 %v) nounwind {
|
||
|
|
; CHECK-LABEL: @test2_PR2274(
|
||
|
|
; CHECK-NEXT: [[Y:%.*]] = lshr i32 %x, 31
|
||
|
|
; CHECK-NEXT: [[R:%.*]] = udiv i32 [[Y]], %v
|
||
|
|
; CHECK-NEXT: [[Z1:%.*]] = zext i32 [[R]] to i64
|
||
|
|
; CHECK-NEXT: ret i64 [[Z1]]
|
||
|
|
;
|
||
|
|
%y = lshr i32 %x, 31
|
||
|
|
%r = udiv i32 %y, %v
|
||
|
|
%z = sext i32 %r to i64
|
||
|
|
ret i64 %z
|
||
|
|
}
|