; 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]
%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
+; CHECK-NEXT: = xor i1 %A, true
+; CHECK-NEXT: ret i1
}
; PR6481
; 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
+}
+
+; CHECK: @test52
+; CHECK-NEXT: and i32 %x1, 16711935
+; CHECK-NEXT: icmp eq i32 {{.*}}, 4980863
+; CHECK-NEXT: ret i1
+define i1 @test52(i32 %x1) nounwind {
+ %conv = and i32 %x1, 255
+ %cmp = icmp eq i32 %conv, 127
+ %tmp2 = lshr i32 %x1, 16
+ %tmp3 = trunc i32 %tmp2 to i8
+ %cmp15 = icmp eq i8 %tmp3, 76
+
+ %A = and i1 %cmp, %cmp15
+ ret i1 %A
+}
+
+; PR9838
+; CHECK: @test53
+; CHECK-NEXT: ashr exact
+; CHECK-NEXT: ashr
+; CHECK-NEXT: icmp
+define i1 @test53(i32 %a, i32 %b) nounwind {
+ %x = ashr exact i32 %a, 30
+ %y = ashr i32 %b, 30
+ %z = icmp eq i32 %x, %y
+ ret i1 %z
+}
+
+; CHECK: @test54
+; CHECK-NEXT: %and = and i8 %a, -64
+; CHECK-NEXT: icmp eq i8 %and, -128
+define i1 @test54(i8 %a) nounwind {
+ %ext = zext i8 %a to i32
+ %and = and i32 %ext, 192
+ %ret = icmp eq i32 %and, 128
+ ret i1 %ret
+}
+
+; CHECK: @test55
+; CHECK-NEXT: icmp eq i32 %a, -123
+define i1 @test55(i32 %a) {
+ %sub = sub i32 0, %a
+ %cmp = icmp eq i32 %sub, 123
+ ret i1 %cmp
+}
+
+; CHECK: @test56
+; CHECK-NEXT: icmp eq i32 %a, -113
+define i1 @test56(i32 %a) {
+ %sub = sub i32 10, %a
+ %cmp = icmp eq i32 %sub, 123
+ ret i1 %cmp
+}
+
+; PR10267 Don't make icmps more expensive when no other inst is subsumed.
+declare void @foo(i32)
+; CHECK: @test57
+; CHECK: %and = and i32 %a, -2
+; CHECK: %cmp = icmp ne i32 %and, 0
+define i1 @test57(i32 %a) {
+ %and = and i32 %a, -2
+ %cmp = icmp ne i32 %and, 0
+ call void @foo(i32 %and)
+ ret i1 %cmp
+}
+
+; rdar://problem/10482509
+; CHECK: @cmpabs1
+; CHECK-NEXT: icmp ne
+define zeroext i1 @cmpabs1(i64 %val) {
+ %sub = sub nsw i64 0, %val
+ %cmp = icmp slt i64 %val, 0
+ %sub.val = select i1 %cmp, i64 %sub, i64 %val
+ %tobool = icmp ne i64 %sub.val, 0
+ ret i1 %tobool
+}
+
+; CHECK: @cmpabs2
+; CHECK-NEXT: icmp ne
+define zeroext i1 @cmpabs2(i64 %val) {
+ %sub = sub nsw i64 0, %val
+ %cmp = icmp slt i64 %val, 0
+ %sub.val = select i1 %cmp, i64 %val, i64 %sub
+ %tobool = icmp ne i64 %sub.val, 0
+ ret i1 %tobool
+}
+
+; CHECK: @test58
+; CHECK-NEXT: call i32 @test58_d(i64 36029346783166592)
+define void @test58() nounwind {
+ %cast = bitcast <1 x i64> <i64 36029346783166592> to i64
+ %call = call i32 @test58_d( i64 %cast) nounwind
+ ret void
+}
+declare i32 @test58_d(i64)
+
+define i1 @test59(i8* %foo) {
+ %bit = bitcast i8* %foo to i32*
+ %gep1 = getelementptr inbounds i32* %bit, i64 2
+ %gep2 = getelementptr inbounds i8* %foo, i64 10
+ %cast1 = bitcast i32* %gep1 to i8*
+ %cmp = icmp ult i8* %cast1, %gep2
+ %use = ptrtoint i8* %cast1 to i64
+ %call = call i32 @test58_d(i64 %use) nounwind
+ ret i1 %cmp
+; CHECK: @test59
+; CHECK: ret i1 true
+}
+
+define i1 @test60(i8* %foo, i64 %i, i64 %j) {
+ %bit = bitcast i8* %foo to i32*
+ %gep1 = getelementptr inbounds i32* %bit, i64 %i
+ %gep2 = getelementptr inbounds i8* %foo, i64 %j
+ %cast1 = bitcast i32* %gep1 to i8*
+ %cmp = icmp ult i8* %cast1, %gep2
+ ret i1 %cmp
+; CHECK: @test60
+; CHECK-NEXT: %gep1.idx = shl nuw i64 %i, 2
+; CHECK-NEXT: icmp slt i64 %gep1.idx, %j
+; CHECK-NEXT: ret i1
+}
+
+define i1 @test61(i8* %foo, i64 %i, i64 %j) {
+ %bit = bitcast i8* %foo to i32*
+ %gep1 = getelementptr i32* %bit, i64 %i
+ %gep2 = getelementptr i8* %foo, i64 %j
+ %cast1 = bitcast i32* %gep1 to i8*
+ %cmp = icmp ult i8* %cast1, %gep2
+ ret i1 %cmp
+; Don't transform non-inbounds GEPs.
+; CHECK: @test61
+; CHECK: icmp ult i8* %cast1, %gep2
+; CHECK-NEXT: ret i1
+}
+
+define i1 @test62(i8* %a) {
+ %arrayidx1 = getelementptr inbounds i8* %a, i64 1
+ %arrayidx2 = getelementptr inbounds i8* %a, i64 10
+ %cmp = icmp slt i8* %arrayidx1, %arrayidx2
+ ret i1 %cmp
+; CHECK: @test62
+; CHECK-NEXT: ret i1 true
+}
+
+define i1 @test63(i8 %a, i32 %b) nounwind {
+ %z = zext i8 %a to i32
+ %t = and i32 %b, 255
+ %c = icmp eq i32 %z, %t
+ ret i1 %c
+; CHECK: @test63
+; CHECK-NEXT: %1 = trunc i32 %b to i8
+; CHECK-NEXT: %c = icmp eq i8 %1, %a
+; CHECK-NEXT: ret i1 %c
+}
+
+define i1 @test64(i8 %a, i32 %b) nounwind {
+ %t = and i32 %b, 255
+ %z = zext i8 %a to i32
+ %c = icmp eq i32 %t, %z
+ ret i1 %c
+; CHECK: @test64
+; CHECK-NEXT: %1 = trunc i32 %b to i8
+; CHECK-NEXT: %c = icmp eq i8 %1, %a
+; CHECK-NEXT: ret i1 %c
+}
+
+define i1 @test65(i64 %A, i64 %B) {
+ %s1 = add i64 %A, %B
+ %s2 = add i64 %A, %B
+ %cmp = icmp eq i64 %s1, %s2
+; CHECK: @test65
+; CHECK-NEXT: ret i1 true
+ ret i1 %cmp
+}
+
+define i1 @test66(i64 %A, i64 %B) {
+ %s1 = add i64 %A, %B
+ %s2 = add i64 %B, %A
+ %cmp = icmp eq i64 %s1, %s2
+; CHECK: @test66
+; CHECK-NEXT: ret i1 true
+ ret i1 %cmp
+}
+
+; CHECK: @test67
+; CHECK: %and = and i32 %x, 96
+; CHECK: %cmp = icmp ne i32 %and, 0
+define i1 @test67(i32 %x) nounwind uwtable {
+ %and = and i32 %x, 127
+ %cmp = icmp sgt i32 %and, 31
+ ret i1 %cmp
+}
+
+; CHECK: @test68
+; CHECK: %cmp = icmp ugt i32 %and, 30
+define i1 @test68(i32 %x) nounwind uwtable {
+ %and = and i32 %x, 127
+ %cmp = icmp sgt i32 %and, 30
+ ret i1 %cmp
+}
+
+; PR14708
+; CHECK: @test69
+; CHECK: %1 = and i32 %c, -33
+; CHECK: %2 = icmp eq i32 %1, 65
+; CHECK: ret i1 %2
+define i1 @test69(i32 %c) nounwind uwtable {
+ %1 = icmp eq i32 %c, 97
+ %2 = icmp eq i32 %c, 65
+ %3 = or i1 %1, %2
+ ret i1 %3
+}
+
+; CHECK: @icmp_sext16trunc
+; CHECK-NEXT: %1 = trunc i32 %x to i16
+; CHECK-NEXT: %cmp = icmp slt i16 %1, 36
+define i1 @icmp_sext16trunc(i32 %x) {
+ %trunc = trunc i32 %x to i16
+ %sext = sext i16 %trunc to i32
+ %cmp = icmp slt i32 %sext, 36
+ ret i1 %cmp
+}
+
+; CHECK: @icmp_sext8trunc
+; CHECK-NEXT: %1 = trunc i32 %x to i8
+; CHECK-NEXT: %cmp = icmp slt i8 %1, 36
+define i1 @icmp_sext8trunc(i32 %x) {
+ %trunc = trunc i32 %x to i8
+ %sext = sext i8 %trunc to i32
+ %cmp = icmp slt i32 %sext, 36
+ ret i1 %cmp
+}
+
+; CHECK: @icmp_shl16
+; CHECK-NEXT: %1 = trunc i32 %x to i16
+; CHECK-NEXT: %cmp = icmp slt i16 %1, 36
+define i1 @icmp_shl16(i32 %x) {
+ %shl = shl i32 %x, 16
+ %cmp = icmp slt i32 %shl, 2359296
+ ret i1 %cmp
+}
+
+; CHECK: @icmp_shl24
+; CHECK-NEXT: %1 = trunc i32 %x to i8
+; CHECK-NEXT: %cmp = icmp slt i8 %1, 36
+define i1 @icmp_shl24(i32 %x) {
+ %shl = shl i32 %x, 24
+ %cmp = icmp slt i32 %shl, 603979776
+ ret i1 %cmp
+}
+
+; If the (shl x, C) preserved the sign and this is a sign test,
+; compare the LHS operand instead
+; CHECK: @icmp_shl_nsw_sgt
+; CHECK-NEXT: icmp sgt i32 %x, 0
+define i1 @icmp_shl_nsw_sgt(i32 %x) {
+ %shl = shl nsw i32 %x, 21
+ %cmp = icmp sgt i32 %shl, 0
+ ret i1 %cmp
+}
+
+; CHECK: @icmp_shl_nsw_sge0
+; CHECK-NEXT: icmp sgt i32 %x, -1
+define i1 @icmp_shl_nsw_sge0(i32 %x) {
+ %shl = shl nsw i32 %x, 21
+ %cmp = icmp sge i32 %shl, 0
+ ret i1 %cmp
+}
+
+; CHECK: @icmp_shl_nsw_sge1
+; CHECK-NEXT: icmp sgt i32 %x, 0
+define i1 @icmp_shl_nsw_sge1(i32 %x) {
+ %shl = shl nsw i32 %x, 21
+ %cmp = icmp sge i32 %shl, 1
+ ret i1 %cmp
+}
+
+; Checks for icmp (eq|ne) (shl x, C), 0
+; CHECK: @icmp_shl_nsw_eq
+; CHECK-NEXT: icmp eq i32 %x, 0
+define i1 @icmp_shl_nsw_eq(i32 %x) {
+ %mul = shl nsw i32 %x, 5
+ %cmp = icmp eq i32 %mul, 0
+ ret i1 %cmp
+}
+
+; CHECK: @icmp_shl_eq
+; CHECK-NOT: icmp eq i32 %mul, 0
+define i1 @icmp_shl_eq(i32 %x) {
+ %mul = shl i32 %x, 5
+ %cmp = icmp eq i32 %mul, 0
+ ret i1 %cmp
+}
+
+; CHECK: @icmp_shl_nsw_ne
+; CHECK-NEXT: icmp ne i32 %x, 0
+define i1 @icmp_shl_nsw_ne(i32 %x) {
+ %mul = shl nsw i32 %x, 7
+ %cmp = icmp ne i32 %mul, 0
+ ret i1 %cmp
+}
+
+; CHECK: @icmp_shl_ne
+; CHECK-NOT: icmp ne i32 %x, 0
+define i1 @icmp_shl_ne(i32 %x) {
+ %mul = shl i32 %x, 7
+ %cmp = icmp ne i32 %mul, 0
+ ret i1 %cmp
+}
+
+; If the (mul x, C) preserved the sign and this is sign test,
+; compare the LHS operand instead
+; CHECK: @icmp_mul_nsw
+; CHECK-NEXT: icmp sgt i32 %x, 0
+define i1 @icmp_mul_nsw(i32 %x) {
+ %mul = mul nsw i32 %x, 12
+ %cmp = icmp sgt i32 %mul, 0
+ ret i1 %cmp
+}
+
+; CHECK: @icmp_mul_nsw1
+; CHECK-NEXT: icmp slt i32 %x, 0
+define i1 @icmp_mul_nsw1(i32 %x) {
+ %mul = mul nsw i32 %x, 12
+ %cmp = icmp sle i32 %mul, -1
+ ret i1 %cmp
+}
+
+; CHECK: @icmp_mul_nsw_neg
+; CHECK-NEXT: icmp slt i32 %x, 1
+define i1 @icmp_mul_nsw_neg(i32 %x) {
+ %mul = mul nsw i32 %x, -12
+ %cmp = icmp sge i32 %mul, 0
+ ret i1 %cmp
+}
+
+; CHECK: @icmp_mul_nsw_neg1
+; CHECK-NEXT: icmp slt i32 %x, 0
+define i1 @icmp_mul_nsw_neg1(i32 %x) {
+ %mul = mul nsw i32 %x, -12
+ %cmp = icmp sge i32 %mul, 1
+ ret i1 %cmp
+}
+
+; CHECK: @icmp_mul_nsw_0
+; CHECK-NOT: icmp sgt i32 %x, 0
+define i1 @icmp_mul_nsw_0(i32 %x) {
+ %mul = mul nsw i32 %x, 0
+ %cmp = icmp sgt i32 %mul, 0
+ ret i1 %cmp
+}
+
+; CHECK: @icmp_mul
+; CHECK-NEXT: %mul = mul i32 %x, -12
+define i1 @icmp_mul(i32 %x) {
+ %mul = mul i32 %x, -12
+ %cmp = icmp sge i32 %mul, 0
+ ret i1 %cmp
+}
+
+; Checks for icmp (eq|ne) (mul x, C), 0
+; CHECK: @icmp_mul_neq0
+; CHECK-NEXT: icmp ne i32 %x, 0
+define i1 @icmp_mul_neq0(i32 %x) {
+ %mul = mul nsw i32 %x, -12
+ %cmp = icmp ne i32 %mul, 0
+ ret i1 %cmp
+}
+
+; CHECK: @icmp_mul_eq0
+; CHECK-NEXT: icmp eq i32 %x, 0
+define i1 @icmp_mul_eq0(i32 %x) {
+ %mul = mul nsw i32 %x, 12
+ %cmp = icmp eq i32 %mul, 0
+ ret i1 %cmp
+}
+
+; CHECK: @icmp_mul0_eq0
+; CHECK-NEXT: ret i1 true
+define i1 @icmp_mul0_eq0(i32 %x) {
+ %mul = mul i32 %x, 0
+ %cmp = icmp eq i32 %mul, 0
+ ret i1 %cmp
+}
+
+; CHECK: @icmp_mul0_ne0
+; CHECK-NEXT: ret i1 false
+define i1 @icmp_mul0_ne0(i32 %x) {
+ %mul = mul i32 %x, 0
+ %cmp = icmp ne i32 %mul, 0
+ ret i1 %cmp
+}
projects / oota-llvm.git / blobdiff