; RUN: opt < %s -instcombine -S | FileCheck %s
+target datalayout =
+"e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
+
define i32 @test1(i32 %X) {
entry:
icmp slt i32 %X, 0 ; <i1>:0 [#uses=1]
%V = icmp eq <2 x i64> %x, undef
ret <2 x i1> %V
; CHECK: @test5
-; CHECK: ret <2 x i1> undef
+; CHECK: ret <2 x i1> <i1 true, i1 true>
}
define i32 @test6(i32 %a, i32 %b) {
%a = add i32 %x, -1
%b = icmp ult i32 %a, %x
ret i1 %b
+; CHECK: @test7
; CHECK: %b = icmp ne i32 %x, 0
; CHECK: ret i1 %b
}
%a = add i32 %x, -1
%b = icmp eq i32 %a, %x
ret i1 %b
+; CHECK: @test8
; CHECK: ret i1 false
}
%a = add i32 %x, -2
%b = icmp ugt i32 %x, %a
ret i1 %b
+; CHECK: @test9
; CHECK: icmp ugt i32 %x, 1
; CHECK: ret i1 %b
}
%b = icmp slt i32 %a, %x
ret i1 %b
+; CHECK: @test10
; CHECK: %b = icmp ne i32 %x, -2147483648
; CHECK: ret i1 %b
}
+
+define i1 @test11(i32 %x) {
+ %a = add nsw i32 %x, 8
+ %b = icmp slt i32 %x, %a
+ ret i1 %b
+; CHECK: @test11
+; CHECK: ret i1 true
+}
+
+; PR6195
+define i1 @test12(i1 %A) {
+ %S = select i1 %A, i64 -4294967295, i64 8589934591
+ %B = icmp ne i64 bitcast (<2 x i32> <i32 1, i32 -1> to i64), %S
+ ret i1 %B
+; CHECK: @test12
+; CHECK-NEXT: %B = select i1
+; CHECK-NEXT: ret i1 %B
+}
+
+; PR6481
+define i1 @test13(i8 %X) nounwind readnone {
+entry:
+ %cmp = icmp slt i8 undef, %X
+ ret i1 %cmp
+; CHECK: @test13
+; CHECK: ret i1 false
+}
+
+define i1 @test14(i8 %X) nounwind readnone {
+entry:
+ %cmp = icmp slt i8 undef, -128
+ ret i1 %cmp
+; CHECK: @test14
+; CHECK: ret i1 false
+}
+
+define i1 @test15() nounwind readnone {
+entry:
+ %cmp = icmp eq i8 undef, -128
+ ret i1 %cmp
+; CHECK: @test15
+; CHECK: ret i1 undef
+}
+
+define i1 @test16() nounwind readnone {
+entry:
+ %cmp = icmp ne i8 undef, -128
+ ret i1 %cmp
+; CHECK: @test16
+; CHECK: ret i1 undef
+}
+
+define i1 @test17(i32 %x) nounwind {
+ %shl = shl i32 1, %x
+ %and = and i32 %shl, 8
+ %cmp = icmp eq i32 %and, 0
+ ret i1 %cmp
+; CHECK: @test17
+; CHECK-NEXT: %cmp = icmp ne i32 %x, 3
+}
+
+
+define i1 @test18(i32 %x) nounwind {
+ %sh = lshr i32 8, %x
+ %and = and i32 %sh, 1
+ %cmp = icmp eq i32 %and, 0
+ ret i1 %cmp
+; CHECK: @test18
+; CHECK-NEXT: %cmp = icmp ne i32 %x, 3
+}
+
+define i1 @test19(i32 %x) nounwind {
+ %shl = shl i32 1, %x
+ %and = and i32 %shl, 8
+ %cmp = icmp eq i32 %and, 8
+ ret i1 %cmp
+; CHECK: @test19
+; CHECK-NEXT: %cmp = icmp eq i32 %x, 3
+}
+
+define i1 @test20(i32 %x) nounwind {
+ %shl = shl i32 1, %x
+ %and = and i32 %shl, 8
+ %cmp = icmp ne i32 %and, 0
+ ret i1 %cmp
+; CHECK: @test20
+; CHECK-NEXT: %cmp = icmp eq i32 %x, 3
+}
+
+define i1 @test21(i8 %x, i8 %y) {
+; CHECK: @test21
+; CHECK-NOT: or i8
+; CHECK: icmp ugt
+ %A = or i8 %x, 1
+ %B = icmp ugt i8 %A, 3
+ ret i1 %B
+}
+
+define i1 @test22(i8 %x, i8 %y) {
+; CHECK: @test22
+; CHECK-NOT: or i8
+; CHECK: icmp ult
+ %A = or i8 %x, 1
+ %B = icmp ult i8 %A, 4
+ ret i1 %B
+}
+
+; PR2740
+; CHECK: @test23
+; CHECK: icmp sgt i32 %x, 1328634634
+define i1 @test23(i32 %x) nounwind {
+ %i3 = sdiv i32 %x, -1328634635
+ %i4 = icmp eq i32 %i3, -1
+ ret i1 %i4
+}
+
+@X = global [1000 x i32] zeroinitializer
+
+; PR8882
+; CHECK: @test24
+; CHECK: %cmp = icmp eq i64 %i, 1000
+; CHECK: ret i1 %cmp
+define i1 @test24(i64 %i) {
+ %p1 = getelementptr inbounds i32* getelementptr inbounds ([1000 x i32]* @X, i64 0, i64 0), i64 %i
+ %cmp = icmp eq i32* %p1, getelementptr inbounds ([1000 x i32]* @X, i64 1, i64 0)
+ ret i1 %cmp
+}
+
+; CHECK: @test25
+; X + Z > Y + Z -> X > Y if there is no overflow.
+; CHECK: %c = icmp sgt i32 %x, %y
+; CHECK: ret i1 %c
+define i1 @test25(i32 %x, i32 %y, i32 %z) {
+ %lhs = add nsw i32 %x, %z
+ %rhs = add nsw i32 %y, %z
+ %c = icmp sgt i32 %lhs, %rhs
+ ret i1 %c
+}
+
+; CHECK: @test26
+; X + Z > Y + Z -> X > Y if there is no overflow.
+; CHECK: %c = icmp ugt i32 %x, %y
+; CHECK: ret i1 %c
+define i1 @test26(i32 %x, i32 %y, i32 %z) {
+ %lhs = add nuw i32 %x, %z
+ %rhs = add nuw i32 %y, %z
+ %c = icmp ugt i32 %lhs, %rhs
+ ret i1 %c
+}
+
+; CHECK: @test27
+; X - Z > Y - Z -> X > Y if there is no overflow.
+; CHECK: %c = icmp sgt i32 %x, %y
+; CHECK: ret i1 %c
+define i1 @test27(i32 %x, i32 %y, i32 %z) {
+ %lhs = sub nsw i32 %x, %z
+ %rhs = sub nsw i32 %y, %z
+ %c = icmp sgt i32 %lhs, %rhs
+ ret i1 %c
+}
+
+; CHECK: @test28
+; X - Z > Y - Z -> X > Y if there is no overflow.
+; CHECK: %c = icmp ugt i32 %x, %y
+; CHECK: ret i1 %c
+define i1 @test28(i32 %x, i32 %y, i32 %z) {
+ %lhs = sub nuw i32 %x, %z
+ %rhs = sub nuw i32 %y, %z
+ %c = icmp ugt i32 %lhs, %rhs
+ ret i1 %c
+}
+
+; CHECK: @test29
+; X + Y > X -> Y > 0 if there is no overflow.
+; CHECK: %c = icmp sgt i32 %y, 0
+; CHECK: ret i1 %c
+define i1 @test29(i32 %x, i32 %y) {
+ %lhs = add nsw i32 %x, %y
+ %c = icmp sgt i32 %lhs, %x
+ ret i1 %c
+}
+
+; CHECK: @test30
+; X + Y > X -> Y > 0 if there is no overflow.
+; CHECK: %c = icmp ne i32 %y, 0
+; CHECK: ret i1 %c
+define i1 @test30(i32 %x, i32 %y) {
+ %lhs = add nuw i32 %x, %y
+ %c = icmp ugt i32 %lhs, %x
+ ret i1 %c
+}
+
+; CHECK: @test31
+; X > X + Y -> 0 > Y if there is no overflow.
+; CHECK: %c = icmp slt i32 %y, 0
+; CHECK: ret i1 %c
+define i1 @test31(i32 %x, i32 %y) {
+ %rhs = add nsw i32 %x, %y
+ %c = icmp sgt i32 %x, %rhs
+ ret i1 %c
+}
+
+; CHECK: @test32
+; X > X + Y -> 0 > Y if there is no overflow.
+; CHECK: ret i1 false
+define i1 @test32(i32 %x, i32 %y) {
+ %rhs = add nuw i32 %x, %y
+ %c = icmp ugt i32 %x, %rhs
+ ret i1 %c
+}
+
+; CHECK: @test33
+; X - Y > X -> 0 > Y if there is no overflow.
+; CHECK: %c = icmp slt i32 %y, 0
+; CHECK: ret i1 %c
+define i1 @test33(i32 %x, i32 %y) {
+ %lhs = sub nsw i32 %x, %y
+ %c = icmp sgt i32 %lhs, %x
+ ret i1 %c
+}
+
+; CHECK: @test34
+; X - Y > X -> 0 > Y if there is no overflow.
+; CHECK: ret i1 false
+define i1 @test34(i32 %x, i32 %y) {
+ %lhs = sub nuw i32 %x, %y
+ %c = icmp ugt i32 %lhs, %x
+ ret i1 %c
+}
+
+; CHECK: @test35
+; X > X - Y -> Y > 0 if there is no overflow.
+; CHECK: %c = icmp sgt i32 %y, 0
+; CHECK: ret i1 %c
+define i1 @test35(i32 %x, i32 %y) {
+ %rhs = sub nsw i32 %x, %y
+ %c = icmp sgt i32 %x, %rhs
+ ret i1 %c
+}
+
+; CHECK: @test36
+; X > X - Y -> Y > 0 if there is no overflow.
+; CHECK: %c = icmp ne i32 %y, 0
+; CHECK: ret i1 %c
+define i1 @test36(i32 %x, i32 %y) {
+ %rhs = sub nuw i32 %x, %y
+ %c = icmp ugt i32 %x, %rhs
+ ret i1 %c
+}
+
+; CHECK: @test37
+; X - Y > X - Z -> Z > Y if there is no overflow.
+; CHECK: %c = icmp sgt i32 %z, %y
+; CHECK: ret i1 %c
+define i1 @test37(i32 %x, i32 %y, i32 %z) {
+ %lhs = sub nsw i32 %x, %y
+ %rhs = sub nsw i32 %x, %z
+ %c = icmp sgt i32 %lhs, %rhs
+ ret i1 %c
+}
+
+; CHECK: @test38
+; X - Y > X - Z -> Z > Y if there is no overflow.
+; CHECK: %c = icmp ugt i32 %z, %y
+; CHECK: ret i1 %c
+define i1 @test38(i32 %x, i32 %y, i32 %z) {
+ %lhs = sub nuw i32 %x, %y
+ %rhs = sub nuw i32 %x, %z
+ %c = icmp ugt i32 %lhs, %rhs
+ ret i1 %c
+}
+
+; PR9343 #1
+; CHECK: @test39
+; CHECK: %B = icmp eq i32 %X, 0
+define i1 @test39(i32 %X, i32 %Y) {
+ %A = ashr exact i32 %X, %Y
+ %B = icmp eq i32 %A, 0
+ ret i1 %B
+}
+
+; CHECK: @test40
+; CHECK: %B = icmp ne i32 %X, 0
+define i1 @test40(i32 %X, i32 %Y) {
+ %A = lshr exact i32 %X, %Y
+ %B = icmp ne i32 %A, 0
+ ret i1 %B
+}
+
+; PR9343 #3
+; CHECK: @test41
+; CHECK: ret i1 true
+define i1 @test41(i32 %X, i32 %Y) {
+ %A = urem i32 %X, %Y
+ %B = icmp ugt i32 %Y, %A
+ ret i1 %B
+}
+
+; CHECK: @test42
+; CHECK: %B = icmp sgt i32 %Y, -1
+define i1 @test42(i32 %X, i32 %Y) {
+ %A = srem i32 %X, %Y
+ %B = icmp slt i32 %A, %Y
+ ret i1 %B
+}
+
+; CHECK: @test43
+; CHECK: %B = icmp slt i32 %Y, 0
+define i1 @test43(i32 %X, i32 %Y) {
+ %A = srem i32 %X, %Y
+ %B = icmp slt i32 %Y, %A
+ ret i1 %B
+}
+
+; CHECK: @test44
+; CHECK: %B = icmp sgt i32 %Y, -1
+define i1 @test44(i32 %X, i32 %Y) {
+ %A = srem i32 %X, %Y
+ %B = icmp slt i32 %A, %Y
+ ret i1 %B
+}
+
+; CHECK: @test45
+; CHECK: %B = icmp slt i32 %Y, 0
+define i1 @test45(i32 %X, i32 %Y) {
+ %A = srem i32 %X, %Y
+ %B = icmp slt i32 %Y, %A
+ ret i1 %B
+}
+
+; PR9343 #4
+; CHECK: @test46
+; CHECK: %C = icmp ult i32 %X, %Y
+define i1 @test46(i32 %X, i32 %Y, i32 %Z) {
+ %A = ashr exact i32 %X, %Z
+ %B = ashr exact i32 %Y, %Z
+ %C = icmp ult i32 %A, %B
+ ret i1 %C
+}
+
+; PR9343 #5
+; CHECK: @test47
+; CHECK: %C = icmp ugt i32 %X, %Y
+define i1 @test47(i32 %X, i32 %Y, i32 %Z) {
+ %A = ashr exact i32 %X, %Z
+ %B = ashr exact i32 %Y, %Z
+ %C = icmp ugt i32 %A, %B
+ ret i1 %C
+}
+
+; PR9343 #8
+; CHECK: @test48
+; CHECK: %C = icmp eq i32 %X, %Y
+define i1 @test48(i32 %X, i32 %Y, i32 %Z) {
+ %A = sdiv exact i32 %X, %Z
+ %B = sdiv exact i32 %Y, %Z
+ %C = icmp eq i32 %A, %B
+ ret i1 %C
+}
+
+; PR8469
+; CHECK: @test49
+; CHECK: ret <2 x i1> <i1 true, i1 true>
+define <2 x i1> @test49(<2 x i32> %tmp3) {
+entry:
+ %tmp11 = and <2 x i32> %tmp3, <i32 3, i32 3>
+ %cmp = icmp ult <2 x i32> %tmp11, <i32 4, i32 4>
+ ret <2 x i1> %cmp
+}
+
+; PR9343 #7
+; CHECK: @test50
+; CHECK: ret i1 true
+define i1 @test50(i16 %X, i32 %Y) {
+ %A = zext i16 %X to i32
+ %B = srem i32 %A, %Y
+ %C = icmp sgt i32 %B, -1
+ ret i1 %C
+}
+
+; CHECK: @test51
+; CHECK: ret i1 %C
+define i1 @test51(i32 %X, i32 %Y) {
+ %A = and i32 %X, 2147483648
+ %B = srem i32 %A, %Y
+ %C = icmp sgt i32 %B, -1
+ ret i1 %C
+}
projects / oota-llvm.git / blobdiff