; 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] | |
zext i1 %0 to i32 ; <i32>:1 [#uses=1] | |
ret i32 %1 | |
; CHECK: @test1 | |
; CHECK: lshr i32 %X, 31 | |
; CHECK-NEXT: ret i32 | |
} | |
define i32 @test2(i32 %X) { | |
entry: | |
icmp ult i32 %X, -2147483648 ; <i1>:0 [#uses=1] | |
zext i1 %0 to i32 ; <i32>:1 [#uses=1] | |
ret i32 %1 | |
; CHECK: @test2 | |
; CHECK: lshr i32 %X, 31 | |
; CHECK-NEXT: xor i32 | |
; CHECK-NEXT: ret i32 | |
} | |
define i32 @test3(i32 %X) { | |
entry: | |
icmp slt i32 %X, 0 ; <i1>:0 [#uses=1] | |
sext i1 %0 to i32 ; <i32>:1 [#uses=1] | |
ret i32 %1 | |
; CHECK: @test3 | |
; CHECK: ashr i32 %X, 31 | |
; CHECK-NEXT: ret i32 | |
} | |
define i32 @test4(i32 %X) { | |
entry: | |
icmp ult i32 %X, -2147483648 ; <i1>:0 [#uses=1] | |
sext i1 %0 to i32 ; <i32>:1 [#uses=1] | |
ret i32 %1 | |
; CHECK: @test4 | |
; CHECK: ashr i32 %X, 31 | |
; CHECK-NEXT: xor i32 | |
; CHECK-NEXT: ret i32 | |
} | |
; PR4837 | |
define <2 x i1> @test5(<2 x i64> %x) { | |
entry: | |
%V = icmp eq <2 x i64> %x, undef | |
ret <2 x i1> %V | |
; CHECK: @test5 | |
; CHECK: ret <2 x i1> <i1 true, i1 true> | |
} | |
define i32 @test6(i32 %a, i32 %b) { | |
%c = icmp sle i32 %a, -1 | |
%d = zext i1 %c to i32 | |
%e = sub i32 0, %d | |
%f = and i32 %e, %b | |
ret i32 %f | |
; CHECK: @test6 | |
; CHECK-NEXT: ashr i32 %a, 31 | |
; CHECK-NEXT: %f = and i32 %e, %b | |
; CHECK-NEXT: ret i32 %f | |
} | |
define i1 @test7(i32 %x) { | |
entry: | |
%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 | |
} | |
define i1 @test8(i32 %x){ | |
entry: | |
%a = add i32 %x, -1 | |
%b = icmp eq i32 %a, %x | |
ret i1 %b | |
; CHECK: @test8 | |
; CHECK: ret i1 false | |
} | |
define i1 @test9(i32 %x) { | |
entry: | |
%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 | |
} | |
define i1 @test10(i32 %x){ | |
entry: | |
%a = add i32 %x, -1 | |
%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 | |
} | |
; 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 | |
} |