forked from OSchip/llvm-project
[InstCombine][NFC] Tests for 'unsigned sub overflow' check
----------------------------------------
Name: unsigned sub, overflow, v0
%sub = sub i8 %x, %y
%ov = icmp ugt i8 %sub, %x
=>
%agg = usub_overflow i8 %x, %y
%sub = extractvalue {i8, i1} %agg, 0
%ov = extractvalue {i8, i1} %agg, 1
Done: 1
Optimization is correct!
----------------------------------------
Name: unsigned sub, no overflow, v0
%sub = sub i8 %x, %y
%ov = icmp ule i8 %sub, %x
=>
%agg = usub_overflow i8 %x, %y
%sub = extractvalue {i8, i1} %agg, 0
%not.ov = extractvalue {i8, i1} %agg, 1
%ov = xor %not.ov, -1
Done: 1
Optimization is correct!
llvm-svn: 371099
This commit is contained in:
Roman Lebedev
parent
745046c23f
commit
1d9e0dcc9d
|
|
@ -0,0 +1,158 @@
|
|||
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
|
||||
; RUN: opt %s -instcombine -S | FileCheck %s
|
||||
|
||||
; Fold
|
||||
; (%x - %y) u<= %x
|
||||
; to
|
||||
; @llvm.sub.with.overflow(%x, %y) + extractvalue + not
|
||||
|
||||
define i1 @t0_basic(i8 %x, i8 %y) {
|
||||
; CHECK-LABEL: @t0_basic(
|
||||
; CHECK-NEXT: [[T0:%.*]] = sub i8 [[X:%.*]], [[Y:%.*]]
|
||||
; CHECK-NEXT: [[R:%.*]] = icmp ule i8 [[T0]], [[X]]
|
||||
; CHECK-NEXT: ret i1 [[R]]
|
||||
;
|
||||
%t0 = sub i8 %x, %y
|
||||
%r = icmp ule i8 %t0, %x
|
||||
ret i1 %r
|
||||
}
|
||||
|
||||
define <2 x i1> @t1_vec(<2 x i8> %x, <2 x i8> %y) {
|
||||
; CHECK-LABEL: @t1_vec(
|
||||
; CHECK-NEXT: [[T0:%.*]] = sub <2 x i8> [[X:%.*]], [[Y:%.*]]
|
||||
; CHECK-NEXT: [[R:%.*]] = icmp ule <2 x i8> [[T0]], [[X]]
|
||||
; CHECK-NEXT: ret <2 x i1> [[R]]
|
||||
;
|
||||
%t0 = sub <2 x i8> %x, %y
|
||||
%r = icmp ule <2 x i8> %t0, %x
|
||||
ret <2 x i1> %r
|
||||
}
|
||||
|
||||
; Commutativity
|
||||
|
||||
define i1 @t2_commutative(i8 %x, i8 %y) {
|
||||
; CHECK-LABEL: @t2_commutative(
|
||||
; CHECK-NEXT: [[T0:%.*]] = sub i8 [[X:%.*]], [[Y:%.*]]
|
||||
; CHECK-NEXT: [[R:%.*]] = icmp ule i8 [[T0]], [[X]]
|
||||
; CHECK-NEXT: ret i1 [[R]]
|
||||
;
|
||||
%t0 = sub i8 %x, %y
|
||||
%r = icmp uge i8 %x, %t0 ; swapped
|
||||
ret i1 %r
|
||||
}
|
||||
|
||||
; Extra-use tests
|
||||
|
||||
declare void @use8(i8)
|
||||
|
||||
define i1 @t3_extrause0(i8 %x, i8 %y) {
|
||||
; CHECK-LABEL: @t3_extrause0(
|
||||
; CHECK-NEXT: [[T0:%.*]] = sub i8 [[X:%.*]], [[Y:%.*]]
|
||||
; CHECK-NEXT: call void @use8(i8 [[T0]])
|
||||
; CHECK-NEXT: [[R:%.*]] = icmp ule i8 [[T0]], [[X]]
|
||||
; CHECK-NEXT: ret i1 [[R]]
|
||||
;
|
||||
%t0 = sub i8 %x, %y
|
||||
call void @use8(i8 %t0)
|
||||
%r = icmp ule i8 %t0, %x
|
||||
ret i1 %r
|
||||
}
|
||||
|
||||
; Negative tests
|
||||
|
||||
define i1 @n4_not_commutative(i8 %x, i8 %y) {
|
||||
; CHECK-LABEL: @n4_not_commutative(
|
||||
; CHECK-NEXT: [[T0:%.*]] = sub i8 [[X:%.*]], [[Y:%.*]]
|
||||
; CHECK-NEXT: [[R:%.*]] = icmp ule i8 [[T0]], [[Y]]
|
||||
; CHECK-NEXT: ret i1 [[R]]
|
||||
;
|
||||
%t0 = sub i8 %x, %y
|
||||
%r = icmp ule i8 %t0, %y ; can't check against %y.
|
||||
ret i1 %r
|
||||
}
|
||||
|
||||
define i1 @n5_wrong_pred0(i8 %x, i8 %y) {
|
||||
; CHECK-LABEL: @n5_wrong_pred0(
|
||||
; CHECK-NEXT: [[T0:%.*]] = sub i8 [[X:%.*]], [[Y:%.*]]
|
||||
; CHECK-NEXT: [[R:%.*]] = icmp ult i8 [[T0]], [[X]]
|
||||
; CHECK-NEXT: ret i1 [[R]]
|
||||
;
|
||||
%t0 = sub i8 %x, %y
|
||||
%r = icmp ult i8 %t0, %x
|
||||
ret i1 %r
|
||||
}
|
||||
|
||||
define i1 @n6_wrong_pred1(i8 %x, i8 %y) {
|
||||
; CHECK-LABEL: @n6_wrong_pred1(
|
||||
; CHECK-NEXT: [[T0:%.*]] = sub i8 [[X:%.*]], [[Y:%.*]]
|
||||
; CHECK-NEXT: [[R:%.*]] = icmp uge i8 [[T0]], [[X]]
|
||||
; CHECK-NEXT: ret i1 [[R]]
|
||||
;
|
||||
%t0 = sub i8 %x, %y
|
||||
%r = icmp uge i8 %t0, %x
|
||||
ret i1 %r
|
||||
}
|
||||
|
||||
define i1 @n7_wrong_pred2(i8 %x, i8 %y) {
|
||||
; CHECK-LABEL: @n7_wrong_pred2(
|
||||
; CHECK-NEXT: [[R:%.*]] = icmp eq i8 [[Y:%.*]], 0
|
||||
; CHECK-NEXT: ret i1 [[R]]
|
||||
;
|
||||
%t0 = sub i8 %x, %y
|
||||
%r = icmp eq i8 %t0, %x
|
||||
ret i1 %r
|
||||
}
|
||||
|
||||
define i1 @n8_wrong_pred3(i8 %x, i8 %y) {
|
||||
; CHECK-LABEL: @n8_wrong_pred3(
|
||||
; CHECK-NEXT: [[R:%.*]] = icmp ne i8 [[Y:%.*]], 0
|
||||
; CHECK-NEXT: ret i1 [[R]]
|
||||
;
|
||||
%t0 = sub i8 %x, %y
|
||||
%r = icmp ne i8 %t0, %x
|
||||
ret i1 %r
|
||||
}
|
||||
|
||||
define i1 @n9_wrong_pred4(i8 %x, i8 %y) {
|
||||
; CHECK-LABEL: @n9_wrong_pred4(
|
||||
; CHECK-NEXT: [[T0:%.*]] = sub i8 [[X:%.*]], [[Y:%.*]]
|
||||
; CHECK-NEXT: [[R:%.*]] = icmp slt i8 [[T0]], [[X]]
|
||||
; CHECK-NEXT: ret i1 [[R]]
|
||||
;
|
||||
%t0 = sub i8 %x, %y
|
||||
%r = icmp slt i8 %t0, %x
|
||||
ret i1 %r
|
||||
}
|
||||
|
||||
define i1 @n10_wrong_pred5(i8 %x, i8 %y) {
|
||||
; CHECK-LABEL: @n10_wrong_pred5(
|
||||
; CHECK-NEXT: [[T0:%.*]] = sub i8 [[X:%.*]], [[Y:%.*]]
|
||||
; CHECK-NEXT: [[R:%.*]] = icmp sle i8 [[T0]], [[X]]
|
||||
; CHECK-NEXT: ret i1 [[R]]
|
||||
;
|
||||
%t0 = sub i8 %x, %y
|
||||
%r = icmp sle i8 %t0, %x
|
||||
ret i1 %r
|
||||
}
|
||||
|
||||
define i1 @n11_wrong_pred6(i8 %x, i8 %y) {
|
||||
; CHECK-LABEL: @n11_wrong_pred6(
|
||||
; CHECK-NEXT: [[T0:%.*]] = sub i8 [[X:%.*]], [[Y:%.*]]
|
||||
; CHECK-NEXT: [[R:%.*]] = icmp sgt i8 [[T0]], [[X]]
|
||||
; CHECK-NEXT: ret i1 [[R]]
|
||||
;
|
||||
%t0 = sub i8 %x, %y
|
||||
%r = icmp sgt i8 %t0, %x
|
||||
ret i1 %r
|
||||
}
|
||||
|
||||
define i1 @n12_wrong_pred7(i8 %x, i8 %y) {
|
||||
; CHECK-LABEL: @n12_wrong_pred7(
|
||||
; CHECK-NEXT: [[T0:%.*]] = sub i8 [[X:%.*]], [[Y:%.*]]
|
||||
; CHECK-NEXT: [[R:%.*]] = icmp sge i8 [[T0]], [[X]]
|
||||
; CHECK-NEXT: ret i1 [[R]]
|
||||
;
|
||||
%t0 = sub i8 %x, %y
|
||||
%r = icmp sge i8 %t0, %x
|
||||
ret i1 %r
|
||||
}
|
||||
|
|
@ -0,0 +1,155 @@
|
|||
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
|
||||
; RUN: opt %s -instcombine -S | FileCheck %s
|
||||
|
||||
; Fold
|
||||
; (%x - %y) u> %x
|
||||
; to
|
||||
; @llvm.sub.with.overflow(%x, %y) + extractvalue
|
||||
|
||||
define i1 @t0_basic(i8 %x, i8 %y) {
|
||||
; CHECK-LABEL: @t0_basic(
|
||||
; CHECK-NEXT: [[R:%.*]] = icmp ult i8 [[X:%.*]], [[Y:%.*]]
|
||||
; CHECK-NEXT: ret i1 [[R]]
|
||||
;
|
||||
%t0 = sub i8 %x, %y
|
||||
%r = icmp ugt i8 %t0, %x
|
||||
ret i1 %r
|
||||
}
|
||||
|
||||
define <2 x i1> @t1_vec(<2 x i8> %x, <2 x i8> %y) {
|
||||
; CHECK-LABEL: @t1_vec(
|
||||
; CHECK-NEXT: [[R:%.*]] = icmp ult <2 x i8> [[X:%.*]], [[Y:%.*]]
|
||||
; CHECK-NEXT: ret <2 x i1> [[R]]
|
||||
;
|
||||
%t0 = sub <2 x i8> %x, %y
|
||||
%r = icmp ugt <2 x i8> %t0, %x
|
||||
ret <2 x i1> %r
|
||||
}
|
||||
|
||||
; Commutativity
|
||||
|
||||
define i1 @t2_commutative(i8 %x, i8 %y) {
|
||||
; CHECK-LABEL: @t2_commutative(
|
||||
; CHECK-NEXT: [[R:%.*]] = icmp ult i8 [[X:%.*]], [[Y:%.*]]
|
||||
; CHECK-NEXT: ret i1 [[R]]
|
||||
;
|
||||
%t0 = sub i8 %x, %y
|
||||
%r = icmp ult i8 %x, %t0 ; swapped
|
||||
ret i1 %r
|
||||
}
|
||||
|
||||
; Extra-use tests
|
||||
|
||||
declare void @use8(i8)
|
||||
|
||||
define i1 @t3_extrause0(i8 %x, i8 %y) {
|
||||
; CHECK-LABEL: @t3_extrause0(
|
||||
; CHECK-NEXT: [[T0:%.*]] = sub i8 [[X:%.*]], [[Y:%.*]]
|
||||
; CHECK-NEXT: call void @use8(i8 [[T0]])
|
||||
; CHECK-NEXT: [[R:%.*]] = icmp ult i8 [[X]], [[Y]]
|
||||
; CHECK-NEXT: ret i1 [[R]]
|
||||
;
|
||||
%t0 = sub i8 %x, %y
|
||||
call void @use8(i8 %t0)
|
||||
%r = icmp ugt i8 %t0, %x
|
||||
ret i1 %r
|
||||
}
|
||||
|
||||
; Negative tests
|
||||
|
||||
define i1 @n4_not_commutative(i8 %x, i8 %y) {
|
||||
; CHECK-LABEL: @n4_not_commutative(
|
||||
; CHECK-NEXT: [[T0:%.*]] = sub i8 [[X:%.*]], [[Y:%.*]]
|
||||
; CHECK-NEXT: [[R:%.*]] = icmp ugt i8 [[T0]], [[Y]]
|
||||
; CHECK-NEXT: ret i1 [[R]]
|
||||
;
|
||||
%t0 = sub i8 %x, %y
|
||||
%r = icmp ugt i8 %t0, %y ; can't check against %y.
|
||||
ret i1 %r
|
||||
}
|
||||
|
||||
define i1 @n5_wrong_pred0(i8 %x, i8 %y) {
|
||||
; CHECK-LABEL: @n5_wrong_pred0(
|
||||
; CHECK-NEXT: [[T0:%.*]] = sub i8 [[X:%.*]], [[Y:%.*]]
|
||||
; CHECK-NEXT: [[R:%.*]] = icmp uge i8 [[T0]], [[X]]
|
||||
; CHECK-NEXT: ret i1 [[R]]
|
||||
;
|
||||
%t0 = sub i8 %x, %y
|
||||
%r = icmp uge i8 %t0, %x
|
||||
ret i1 %r
|
||||
}
|
||||
|
||||
define i1 @n6_wrong_pred1(i8 %x, i8 %y) {
|
||||
; CHECK-LABEL: @n6_wrong_pred1(
|
||||
; CHECK-NEXT: [[T0:%.*]] = sub i8 [[X:%.*]], [[Y:%.*]]
|
||||
; CHECK-NEXT: [[R:%.*]] = icmp ult i8 [[T0]], [[X]]
|
||||
; CHECK-NEXT: ret i1 [[R]]
|
||||
;
|
||||
%t0 = sub i8 %x, %y
|
||||
%r = icmp ult i8 %t0, %x
|
||||
ret i1 %r
|
||||
}
|
||||
|
||||
define i1 @n7_wrong_pred2(i8 %x, i8 %y) {
|
||||
; CHECK-LABEL: @n7_wrong_pred2(
|
||||
; CHECK-NEXT: [[R:%.*]] = icmp eq i8 [[Y:%.*]], 0
|
||||
; CHECK-NEXT: ret i1 [[R]]
|
||||
;
|
||||
%t0 = sub i8 %x, %y
|
||||
%r = icmp eq i8 %t0, %x
|
||||
ret i1 %r
|
||||
}
|
||||
|
||||
define i1 @n8_wrong_pred3(i8 %x, i8 %y) {
|
||||
; CHECK-LABEL: @n8_wrong_pred3(
|
||||
; CHECK-NEXT: [[R:%.*]] = icmp ne i8 [[Y:%.*]], 0
|
||||
; CHECK-NEXT: ret i1 [[R]]
|
||||
;
|
||||
%t0 = sub i8 %x, %y
|
||||
%r = icmp ne i8 %t0, %x
|
||||
ret i1 %r
|
||||
}
|
||||
|
||||
define i1 @n9_wrong_pred4(i8 %x, i8 %y) {
|
||||
; CHECK-LABEL: @n9_wrong_pred4(
|
||||
; CHECK-NEXT: [[T0:%.*]] = sub i8 [[X:%.*]], [[Y:%.*]]
|
||||
; CHECK-NEXT: [[R:%.*]] = icmp slt i8 [[T0]], [[X]]
|
||||
; CHECK-NEXT: ret i1 [[R]]
|
||||
;
|
||||
%t0 = sub i8 %x, %y
|
||||
%r = icmp slt i8 %t0, %x
|
||||
ret i1 %r
|
||||
}
|
||||
|
||||
define i1 @n10_wrong_pred5(i8 %x, i8 %y) {
|
||||
; CHECK-LABEL: @n10_wrong_pred5(
|
||||
; CHECK-NEXT: [[T0:%.*]] = sub i8 [[X:%.*]], [[Y:%.*]]
|
||||
; CHECK-NEXT: [[R:%.*]] = icmp sle i8 [[T0]], [[X]]
|
||||
; CHECK-NEXT: ret i1 [[R]]
|
||||
;
|
||||
%t0 = sub i8 %x, %y
|
||||
%r = icmp sle i8 %t0, %x
|
||||
ret i1 %r
|
||||
}
|
||||
|
||||
define i1 @n11_wrong_pred6(i8 %x, i8 %y) {
|
||||
; CHECK-LABEL: @n11_wrong_pred6(
|
||||
; CHECK-NEXT: [[T0:%.*]] = sub i8 [[X:%.*]], [[Y:%.*]]
|
||||
; CHECK-NEXT: [[R:%.*]] = icmp sgt i8 [[T0]], [[X]]
|
||||
; CHECK-NEXT: ret i1 [[R]]
|
||||
;
|
||||
%t0 = sub i8 %x, %y
|
||||
%r = icmp sgt i8 %t0, %x
|
||||
ret i1 %r
|
||||
}
|
||||
|
||||
define i1 @n12_wrong_pred7(i8 %x, i8 %y) {
|
||||
; CHECK-LABEL: @n12_wrong_pred7(
|
||||
; CHECK-NEXT: [[T0:%.*]] = sub i8 [[X:%.*]], [[Y:%.*]]
|
||||
; CHECK-NEXT: [[R:%.*]] = icmp sge i8 [[T0]], [[X]]
|
||||
; CHECK-NEXT: ret i1 [[R]]
|
||||
;
|
||||
%t0 = sub i8 %x, %y
|
||||
%r = icmp sge i8 %t0, %x
|
||||
ret i1 %r
|
||||
}
|
||||
Loading…
Reference in New Issue