RPCS3/llvm-mirror
1
0
Fork 0
mirror of https://github.com/RPCS3/llvm-mirror.git synced 2024-11-23 11:13:28 +01:00
Code Issues Projects Releases Wiki Activity
557ca60d45
llvm-mirror/test/Transforms/CorrelatedValuePropagation/range.ll
Philip Reames 044f56dbf9 [CVP] Remove a masking operation if range information implies it's a noop 
This is really a known bits style transformation, but known bits isn't context sensitive. The particular case which comes up happens to involve a range which allows range based reasoning to eliminate the mask pattern, so handle that case specifically in CVP.

InstCombine likes to generate the mask-by-low-bits pattern when widening an arithmetic expression which includes a zext in the middle.

Differential Revision: https://reviews.llvm.org/D68811

llvm-svn: 374506
2019-10-11 03:48:56 +00:00

917 lines
22 KiB
LLVM
Raw Blame History

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -correlated-propagation -S < %s | FileCheck %s
declare i32 @foo()
define i32 @test1(i32 %a) nounwind {
; CHECK-LABEL: @test1(
; CHECK-NEXT: [[A_OFF:%.*]] = add i32 [[A:%.*]], -8
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 [[A_OFF]], 8
; CHECK-NEXT: br i1 [[CMP]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK: then:
; CHECK-NEXT: br i1 false, label [[END:%.*]], label [[ELSE]]
; CHECK: else:
; CHECK-NEXT: ret i32 1
; CHECK: end:
; CHECK-NEXT: ret i32 2
;
%a.off = add i32 %a, -8
%cmp = icmp ult i32 %a.off, 8
br i1 %cmp, label %then, label %else
then:
%dead = icmp eq i32 %a, 7
br i1 %dead, label %end, label %else
else:
ret i32 1
end:
ret i32 2
}
define i32 @test2(i32 %a) nounwind {
; CHECK-LABEL: @test2(
; CHECK-NEXT: [[A_OFF:%.*]] = add i32 [[A:%.*]], -8
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 [[A_OFF]], 8
; CHECK-NEXT: br i1 [[CMP]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK: then:
; CHECK-NEXT: br i1 false, label [[END:%.*]], label [[ELSE]]
; CHECK: else:
; CHECK-NEXT: ret i32 1
; CHECK: end:
; CHECK-NEXT: ret i32 2
;
%a.off = add i32 %a, -8
%cmp = icmp ult i32 %a.off, 8
br i1 %cmp, label %then, label %else
then:
%dead = icmp ugt i32 %a, 15
br i1 %dead, label %end, label %else
else:
ret i32 1
end:
ret i32 2
}
define i32 @test3(i32 %c) nounwind {
; CHECK-LABEL: @test3(
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[C:%.*]], 2
; CHECK-NEXT: br i1 [[CMP]], label [[IF_THEN:%.*]], label [[IF_END:%.*]]
; CHECK: if.then:
; CHECK-NEXT: ret i32 1
; CHECK: if.end:
; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i32 [[C]], 3
; CHECK-NEXT: br i1 [[CMP1]], label [[IF_THEN2:%.*]], label [[IF_END8:%.*]]
; CHECK: if.then2:
; CHECK-NEXT: br i1 true, label [[IF_THEN4:%.*]], label [[IF_END6:%.*]]
; CHECK: if.end6:
; CHECK-NEXT: ret i32 2
; CHECK: if.then4:
; CHECK-NEXT: ret i32 3
; CHECK: if.end8:
; CHECK-NEXT: ret i32 4
;
%cmp = icmp slt i32 %c, 2
br i1 %cmp, label %if.then, label %if.end
if.then:
ret i32 1
if.end:
%cmp1 = icmp slt i32 %c, 3
br i1 %cmp1, label %if.then2, label %if.end8
if.then2:
%cmp2 = icmp eq i32 %c, 2
br i1 %cmp2, label %if.then4, label %if.end6
if.end6:
ret i32 2
if.then4:
ret i32 3
if.end8:
ret i32 4
}
define i32 @test4(i32 %c) nounwind {
; CHECK-LABEL: @test4(
; CHECK-NEXT: switch i32 [[C:%.*]], label [[SW_DEFAULT:%.*]] [
; CHECK-NEXT: i32 1, label [[SW_BB:%.*]]
; CHECK-NEXT: i32 2, label [[SW_BB]]
; CHECK-NEXT: i32 4, label [[SW_BB]]
; CHECK-NEXT: ]
; CHECK: sw.bb:
; CHECK-NEXT: br i1 true, label [[IF_THEN:%.*]], label [[IF_END:%.*]]
; CHECK: if.then:
; CHECK-NEXT: br label [[RETURN:%.*]]
; CHECK: if.end:
; CHECK-NEXT: br label [[RETURN]]
; CHECK: sw.default:
; CHECK-NEXT: br label [[RETURN]]
; CHECK: return:
; CHECK-NEXT: [[RETVAL_0:%.*]] = phi i32 [ 42, [[SW_DEFAULT]] ], [ 4, [[IF_THEN]] ], [ 9, [[IF_END]] ]
; CHECK-NEXT: ret i32 [[RETVAL_0]]
;
switch i32 %c, label %sw.default [
i32 1, label %sw.bb
i32 2, label %sw.bb
i32 4, label %sw.bb
]
sw.bb:
%cmp = icmp sge i32 %c, 1
br i1 %cmp, label %if.then, label %if.end
if.then:
br label %return
if.end:
br label %return
sw.default:
br label %return
return:
%retval.0 = phi i32 [ 42, %sw.default ], [ 4, %if.then ], [ 9, %if.end ]
ret i32 %retval.0
}
define i1 @test5(i32 %c) nounwind {
; CHECK-LABEL: @test5(
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[C:%.*]], 5
; CHECK-NEXT: br i1 [[CMP]], label [[IF_THEN:%.*]], label [[IF_END:%.*]]
; CHECK: if.then:
; CHECK-NEXT: [[CMP1:%.*]] = icmp eq i32 [[C]], 4
; CHECK-NEXT: br i1 [[CMP1]], label [[IF_END]], label [[IF_END8:%.*]]
; CHECK: if.end:
; CHECK-NEXT: ret i1 true
; CHECK: if.end8:
; CHECK-NEXT: [[CMP2:%.*]] = icmp eq i32 [[C]], 3
; CHECK-NEXT: [[OR:%.*]] = or i1 false, false
; CHECK-NEXT: ret i1 [[CMP2]]
;
%cmp = icmp slt i32 %c, 5
br i1 %cmp, label %if.then, label %if.end
if.then:
%cmp1 = icmp eq i32 %c, 4
br i1 %cmp1, label %if.end, label %if.end8
if.end:
ret i1 true
if.end8:
%cmp2 = icmp eq i32 %c, 3
%cmp3 = icmp eq i32 %c, 4
%cmp4 = icmp eq i32 %c, 6
%or = or i1 %cmp3, %cmp4
ret i1 %cmp2
}
define i1 @test6(i32 %c) nounwind {
; CHECK-LABEL: @test6(
; CHECK-NEXT: [[CMP:%.*]] = icmp ule i32 [[C:%.*]], 7
; CHECK-NEXT: br i1 [[CMP]], label [[IF_THEN:%.*]], label [[IF_END:%.*]]
; CHECK: if.then:
; CHECK-NEXT: [[COND:%.*]] = icmp eq i32 [[C]], 6
; CHECK-NEXT: br i1 [[COND]], label [[SW_BB:%.*]], label [[IF_END]]
; CHECK: if.end:
; CHECK-NEXT: ret i1 true
; CHECK: sw.bb:
; CHECK-NEXT: ret i1 true
;
%cmp = icmp ule i32 %c, 7
br i1 %cmp, label %if.then, label %if.end
if.then:
switch i32 %c, label %if.end [
i32 6, label %sw.bb
i32 8, label %sw.bb
]
if.end:
ret i1 true
sw.bb:
%cmp2 = icmp eq i32 %c, 6
ret i1 %cmp2
}
define i1 @test7(i32 %c) nounwind {
; CHECK-LABEL: @test7(
; CHECK-NEXT: entry:
; CHECK-NEXT: switch i32 [[C:%.*]], label [[SW_DEFAULT:%.*]] [
; CHECK-NEXT: i32 6, label [[SW_BB:%.*]]
; CHECK-NEXT: i32 7, label [[SW_BB]]
; CHECK-NEXT: ]
; CHECK: sw.bb:
; CHECK-NEXT: ret i1 true
; CHECK: sw.default:
; CHECK-NEXT: [[CMP5:%.*]] = icmp eq i32 [[C]], 5
; CHECK-NEXT: [[CMP8:%.*]] = icmp eq i32 [[C]], 8
; CHECK-NEXT: [[OR:%.*]] = or i1 [[CMP5]], false
; CHECK-NEXT: [[OR2:%.*]] = or i1 false, [[CMP8]]
; CHECK-NEXT: ret i1 false
;
entry:
switch i32 %c, label %sw.default [
i32 6, label %sw.bb
i32 7, label %sw.bb
]
sw.bb:
ret i1 true
sw.default:
%cmp5 = icmp eq i32 %c, 5
%cmp6 = icmp eq i32 %c, 6
%cmp7 = icmp eq i32 %c, 7
%cmp8 = icmp eq i32 %c, 8
%or = or i1 %cmp5, %cmp6
%or2 = or i1 %cmp7, %cmp8
ret i1 false
}
define i1 @test8(i64* %p) {
; CHECK-LABEL: @test8(
; CHECK-NEXT: [[A:%.*]] = load i64, i64* [[P:%.*]], !range !0
; CHECK-NEXT: [[RES:%.*]] = icmp eq i64 [[A]], 0
; CHECK-NEXT: ret i1 false
;
%a = load i64, i64* %p, !range !{i64 4, i64 255}
%res = icmp eq i64 %a, 0
ret i1 %res
}
define i1 @test9(i64* %p) {
; CHECK-LABEL: @test9(
; CHECK-NEXT: [[A:%.*]] = load i64, i64* [[P:%.*]], !range !1
; CHECK-NEXT: [[RES:%.*]] = icmp eq i64 [[A]], 0
; CHECK-NEXT: ret i1 true
;
%a = load i64, i64* %p, !range !{i64 0, i64 1}
%res = icmp eq i64 %a, 0
ret i1 %res
}
define i1 @test10(i64* %p) {
; CHECK-LABEL: @test10(
; CHECK-NEXT: [[A:%.*]] = load i64, i64* [[P:%.*]], !range !2
; CHECK-NEXT: [[RES:%.*]] = icmp eq i64 [[A]], 0
; CHECK-NEXT: ret i1 false
;
%a = load i64, i64* %p, !range !{i64 4, i64 8, i64 15, i64 20}
%res = icmp eq i64 %a, 0
ret i1 %res
}
@g = external global i32
define i1 @test11() {
; CHECK-LABEL: @test11(
; CHECK-NEXT: [[POSITIVE:%.*]] = load i32, i32* @g, !range !3
; CHECK-NEXT: [[ADD:%.*]] = add nuw nsw i32 [[POSITIVE]], 1
; CHECK-NEXT: [[TEST:%.*]] = icmp sgt i32 [[ADD]], 0
; CHECK-NEXT: br label [[NEXT:%.*]]
; CHECK: next:
; CHECK-NEXT: ret i1 true
;
%positive = load i32, i32* @g, !range !{i32 1, i32 2048}
%add = add i32 %positive, 1
%test = icmp sgt i32 %add, 0
br label %next
next:
ret i1 %test
}
define i32 @test12(i32 %a, i32 %b) {
; CHECK-LABEL: @test12(
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: br i1 [[CMP]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK: then:
; CHECK-NEXT: br i1 false, label [[END:%.*]], label [[ELSE]]
; CHECK: else:
; CHECK-NEXT: ret i32 1
; CHECK: end:
; CHECK-NEXT: ret i32 2
;
%cmp = icmp ult i32 %a, %b
br i1 %cmp, label %then, label %else
then:
%dead = icmp eq i32 %a, -1
br i1 %dead, label %end, label %else
else:
ret i32 1
end:
ret i32 2
}
define i32 @test12_swap(i32 %a, i32 %b) {
; CHECK-LABEL: @test12_swap(
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 [[B:%.*]], [[A:%.*]]
; CHECK-NEXT: br i1 [[CMP]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK: then:
; CHECK-NEXT: br i1 false, label [[END:%.*]], label [[ELSE]]
; CHECK: else:
; CHECK-NEXT: ret i32 1
; CHECK: end:
; CHECK-NEXT: ret i32 2
;
%cmp = icmp ugt i32 %b, %a
br i1 %cmp, label %then, label %else
then:
%dead = icmp eq i32 %a, -1
br i1 %dead, label %end, label %else
else:
ret i32 1
end:
ret i32 2
}
; The same as @test12 but the second check is on the false path
define i32 @test12_neg(i32 %a, i32 %b) {
; CHECK-LABEL: @test12_neg(
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: br i1 [[CMP]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK: else:
; CHECK-NEXT: [[ALIVE:%.*]] = icmp eq i32 [[A]], -1
; CHECK-NEXT: br i1 [[ALIVE]], label [[END:%.*]], label [[THEN]]
; CHECK: then:
; CHECK-NEXT: ret i32 1
; CHECK: end:
; CHECK-NEXT: ret i32 2
;
%cmp = icmp ult i32 %a, %b
br i1 %cmp, label %then, label %else
else:
%alive = icmp eq i32 %a, -1
br i1 %alive, label %end, label %then
then:
ret i32 1
end:
ret i32 2
}
; The same as @test12 but with signed comparison
define i32 @test12_signed(i32 %a, i32 %b) {
; CHECK-LABEL: @test12_signed(
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: br i1 [[CMP]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK: then:
; CHECK-NEXT: br i1 false, label [[END:%.*]], label [[ELSE]]
; CHECK: else:
; CHECK-NEXT: ret i32 1
; CHECK: end:
; CHECK-NEXT: ret i32 2
;
%cmp = icmp slt i32 %a, %b
br i1 %cmp, label %then, label %else
then:
%dead = icmp eq i32 %a, 2147483647
br i1 %dead, label %end, label %else
else:
ret i32 1
end:
ret i32 2
}
define i32 @test13(i32 %a, i32 %b) {
; CHECK-LABEL: @test13(
; CHECK-NEXT: [[A_OFF:%.*]] = add i32 [[A:%.*]], -8
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 [[A_OFF]], [[B:%.*]]
; CHECK-NEXT: br i1 [[CMP]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK: then:
; CHECK-NEXT: br i1 false, label [[END:%.*]], label [[ELSE]]
; CHECK: else:
; CHECK-NEXT: ret i32 1
; CHECK: end:
; CHECK-NEXT: ret i32 2
;
%a.off = add i32 %a, -8
%cmp = icmp ult i32 %a.off, %b
br i1 %cmp, label %then, label %else
then:
%dead = icmp eq i32 %a, 7
br i1 %dead, label %end, label %else
else:
ret i32 1
end:
ret i32 2
}
define i32 @test13_swap(i32 %a, i32 %b) {
; CHECK-LABEL: @test13_swap(
; CHECK-NEXT: [[A_OFF:%.*]] = add i32 [[A:%.*]], -8
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 [[B:%.*]], [[A_OFF]]
; CHECK-NEXT: br i1 [[CMP]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK: then:
; CHECK-NEXT: br i1 false, label [[END:%.*]], label [[ELSE]]
; CHECK: else:
; CHECK-NEXT: ret i32 1
; CHECK: end:
; CHECK-NEXT: ret i32 2
;
%a.off = add i32 %a, -8
%cmp = icmp ugt i32 %b, %a.off
br i1 %cmp, label %then, label %else
then:
%dead = icmp eq i32 %a, 7
br i1 %dead, label %end, label %else
else:
ret i32 1
end:
ret i32 2
}
define i1 @test14_slt(i32 %a) {
; CHECK-LABEL: @test14_slt(
; CHECK-NEXT: [[A_OFF:%.*]] = add i32 [[A:%.*]], -8
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[A_OFF]], 8
; CHECK-NEXT: br i1 [[CMP]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK: then:
; CHECK-NEXT: [[RESULT:%.*]] = or i1 false, false
; CHECK-NEXT: ret i1 [[RESULT]]
; CHECK: else:
; CHECK-NEXT: ret i1 false
;
%a.off = add i32 %a, -8
%cmp = icmp slt i32 %a.off, 8
br i1 %cmp, label %then, label %else
then:
%dead.1 = icmp eq i32 %a, -2147483641
%dead.2 = icmp eq i32 %a, 16
%result = or i1 %dead.1, %dead.2
ret i1 %result
else:
ret i1 false
}
define i1 @test14_sle(i32 %a) {
; CHECK-LABEL: @test14_sle(
; CHECK-NEXT: [[A_OFF:%.*]] = add i32 [[A:%.*]], -8
; CHECK-NEXT: [[CMP:%.*]] = icmp sle i32 [[A_OFF]], 8
; CHECK-NEXT: br i1 [[CMP]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK: then:
; CHECK-NEXT: [[ALIVE:%.*]] = icmp eq i32 [[A]], 16
; CHECK-NEXT: [[RESULT:%.*]] = or i1 false, [[ALIVE]]
; CHECK-NEXT: ret i1 [[RESULT]]
; CHECK: else:
; CHECK-NEXT: ret i1 false
;
%a.off = add i32 %a, -8
%cmp = icmp sle i32 %a.off, 8
br i1 %cmp, label %then, label %else
then:
%dead = icmp eq i32 %a, -2147483641
%alive = icmp eq i32 %a, 16
%result = or i1 %dead, %alive
ret i1 %result
else:
ret i1 false
}
define i1 @test14_sgt(i32 %a) {
; CHECK-LABEL: @test14_sgt(
; CHECK-NEXT: [[A_OFF:%.*]] = add i32 [[A:%.*]], -8
; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 [[A_OFF]], 8
; CHECK-NEXT: br i1 [[CMP]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK: then:
; CHECK-NEXT: [[RESULT:%.*]] = or i1 false, false
; CHECK-NEXT: ret i1 [[RESULT]]
; CHECK: else:
; CHECK-NEXT: ret i1 false
;
%a.off = add i32 %a, -8
%cmp = icmp sgt i32 %a.off, 8
br i1 %cmp, label %then, label %else
then:
%dead.1 = icmp eq i32 %a, -2147483640
%dead.2 = icmp eq i32 %a, 16
%result = or i1 %dead.1, %dead.2
ret i1 %result
else:
ret i1 false
}
define i1 @test14_sge(i32 %a) {
; CHECK-LABEL: @test14_sge(
; CHECK-NEXT: [[A_OFF:%.*]] = add i32 [[A:%.*]], -8
; CHECK-NEXT: [[CMP:%.*]] = icmp sge i32 [[A_OFF]], 8
; CHECK-NEXT: br i1 [[CMP]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK: then:
; CHECK-NEXT: [[ALIVE:%.*]] = icmp eq i32 [[A]], 16
; CHECK-NEXT: [[RESULT:%.*]] = or i1 false, [[ALIVE]]
; CHECK-NEXT: ret i1 [[RESULT]]
; CHECK: else:
; CHECK-NEXT: ret i1 false
;
%a.off = add i32 %a, -8
%cmp = icmp sge i32 %a.off, 8
br i1 %cmp, label %then, label %else
then:
%dead = icmp eq i32 %a, -2147483640
%alive = icmp eq i32 %a, 16
%result = or i1 %dead, %alive
ret i1 %result
else:
ret i1 false
}
define i1 @test14_ule(i32 %a) {
; CHECK-LABEL: @test14_ule(
; CHECK-NEXT: [[A_OFF:%.*]] = add i32 [[A:%.*]], -8
; CHECK-NEXT: [[CMP:%.*]] = icmp ule i32 [[A_OFF]], 8
; CHECK-NEXT: br i1 [[CMP]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK: then:
; CHECK-NEXT: [[ALIVE:%.*]] = icmp eq i32 [[A]], 16
; CHECK-NEXT: [[RESULT:%.*]] = or i1 false, [[ALIVE]]
; CHECK-NEXT: ret i1 [[RESULT]]
; CHECK: else:
; CHECK-NEXT: ret i1 false
;
%a.off = add i32 %a, -8
%cmp = icmp ule i32 %a.off, 8
br i1 %cmp, label %then, label %else
then:
%dead = icmp eq i32 %a, 7
%alive = icmp eq i32 %a, 16
%result = or i1 %dead, %alive
ret i1 %result
else:
ret i1 false
}
define i1 @test14_ugt(i32 %a) {
; CHECK-LABEL: @test14_ugt(
; CHECK-NEXT: [[A_OFF:%.*]] = add i32 [[A:%.*]], -8
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 [[A_OFF]], 8
; CHECK-NEXT: br i1 [[CMP]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK: then:
; CHECK-NEXT: [[RESULT:%.*]] = or i1 false, false
; CHECK-NEXT: ret i1 [[RESULT]]
; CHECK: else:
; CHECK-NEXT: ret i1 false
;
%a.off = add i32 %a, -8
%cmp = icmp ugt i32 %a.off, 8
br i1 %cmp, label %then, label %else
then:
%dead.1 = icmp eq i32 %a, 8
%dead.2 = icmp eq i32 %a, 16
%result = or i1 %dead.1, %dead.2
ret i1 %result
else:
ret i1 false
}
define i1 @test14_uge(i32 %a) {
; CHECK-LABEL: @test14_uge(
; CHECK-NEXT: [[A_OFF:%.*]] = add i32 [[A:%.*]], -8
; CHECK-NEXT: [[CMP:%.*]] = icmp uge i32 [[A_OFF]], 8
; CHECK-NEXT: br i1 [[CMP]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK: then:
; CHECK-NEXT: [[ALIVE:%.*]] = icmp eq i32 [[A]], 16
; CHECK-NEXT: [[RESULT:%.*]] = or i1 false, [[ALIVE]]
; CHECK-NEXT: ret i1 [[RESULT]]
; CHECK: else:
; CHECK-NEXT: ret i1 false
;
%a.off = add i32 %a, -8
%cmp = icmp uge i32 %a.off, 8
br i1 %cmp, label %then, label %else
then:
%dead = icmp eq i32 %a, 8
%alive = icmp eq i32 %a, 16
%result = or i1 %dead, %alive
ret i1 %result
else:
ret i1 false
}
@limit = external global i32
define i1 @test15(i32 %a) {
; CHECK-LABEL: @test15(
; CHECK-NEXT: [[LIMIT:%.*]] = load i32, i32* @limit, !range !4
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 [[A:%.*]], [[LIMIT]]
; CHECK-NEXT: br i1 [[CMP]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK: then:
; CHECK-NEXT: ret i1 false
; CHECK: else:
; CHECK-NEXT: ret i1 false
;
%limit = load i32, i32* @limit, !range !{i32 0, i32 256}
%cmp = icmp ult i32 %a, %limit
br i1 %cmp, label %then, label %else
then:
%result = icmp eq i32 %a, 255
ret i1 %result
else:
ret i1 false
}
define i32 @test16(i8 %a) {
; CHECK-LABEL: @test16(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[B:%.*]] = zext i8 [[A:%.*]] to i32
; CHECK-NEXT: br label [[DISPATCH:%.*]]
; CHECK: dispatch:
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i8 [[A]], 93
; CHECK-NEXT: br i1 [[CMP]], label [[TARGET93:%.*]], label [[DISPATCH]]
; CHECK: target93:
; CHECK-NEXT: ret i32 93
;
entry:
%b = zext i8 %a to i32
br label %dispatch
dispatch:
%cmp = icmp eq i8 %a, 93
br i1 %cmp, label %target93, label %dispatch
target93:
ret i32 %b
}
define i32 @test16_i1(i1 %a) {
; CHECK-LABEL: @test16_i1(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[B:%.*]] = zext i1 [[A:%.*]] to i32
; CHECK-NEXT: br label [[DISPATCH:%.*]]
; CHECK: dispatch:
; CHECK-NEXT: br i1 [[A]], label [[TRUE:%.*]], label [[DISPATCH]]
; CHECK: true:
; CHECK-NEXT: ret i32 1
;
entry:
%b = zext i1 %a to i32
br label %dispatch
dispatch:
br i1 %a, label %true, label %dispatch
true:
ret i32 %b
}
define i8 @test17(i8 %a) {
; CHECK-LABEL: @test17(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[C:%.*]] = add i8 [[A:%.*]], 3
; CHECK-NEXT: br label [[DISPATCH:%.*]]
; CHECK: dispatch:
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i8 [[A]], 93
; CHECK-NEXT: br i1 [[CMP]], label [[TARGET93:%.*]], label [[DISPATCH]]
; CHECK: target93:
; CHECK-NEXT: ret i8 96
;
entry:
%c = add i8 %a, 3
br label %dispatch
dispatch:
%cmp = icmp eq i8 %a, 93
br i1 %cmp, label %target93, label %dispatch
target93:
ret i8 %c
}
define i8 @test17_2(i8 %a) {
; CHECK-LABEL: @test17_2(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[C:%.*]] = add i8 [[A:%.*]], [[A]]
; CHECK-NEXT: br label [[DISPATCH:%.*]]
; CHECK: dispatch:
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i8 [[A]], 93
; CHECK-NEXT: br i1 [[CMP]], label [[TARGET93:%.*]], label [[DISPATCH]]
; CHECK: target93:
; CHECK-NEXT: ret i8 -70
;
entry:
%c = add i8 %a, %a
br label %dispatch
dispatch:
%cmp = icmp eq i8 %a, 93
br i1 %cmp, label %target93, label %dispatch
target93:
ret i8 %c
}
define i1 @test17_i1(i1 %a) {
; CHECK-LABEL: @test17_i1(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[DISPATCH:%.*]]
; CHECK: dispatch:
; CHECK-NEXT: br i1 [[A:%.*]], label [[TRUE:%.*]], label [[DISPATCH]]
; CHECK: true:
; CHECK-NEXT: ret i1 true
;
entry:
%c = and i1 %a, true
br label %dispatch
dispatch:
br i1 %a, label %true, label %dispatch
true:
ret i1 %c
}
define i32 @test18(i8 %a) {
; CHECK-LABEL: @test18(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[B:%.*]] = zext i8 [[A:%.*]] to i32
; CHECK-NEXT: br label [[DISPATCH:%.*]]
; CHECK: dispatch:
; CHECK-NEXT: switch i8 [[A]], label [[DISPATCH]] [
; CHECK-NEXT: i8 93, label [[TARGET93:%.*]]
; CHECK-NEXT: i8 -111, label [[DISPATCH]]
; CHECK-NEXT: ]
; CHECK: target93:
; CHECK-NEXT: ret i32 93
;
entry:
%b = zext i8 %a to i32
br label %dispatch
dispatch:
switch i8 %a, label %dispatch [
i8 93, label %target93
i8 -111, label %dispatch
]
target93:
ret i32 %b
}
define i8 @test19(i8 %a) {
; CHECK-LABEL: @test19(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[C:%.*]] = add i8 [[A:%.*]], 3
; CHECK-NEXT: br label [[DISPATCH:%.*]]
; CHECK: dispatch:
; CHECK-NEXT: switch i8 [[A]], label [[DISPATCH]] [
; CHECK-NEXT: i8 93, label [[TARGET93:%.*]]
; CHECK-NEXT: i8 -111, label [[DISPATCH]]
; CHECK-NEXT: ]
; CHECK: target93:
; CHECK-NEXT: ret i8 96
;
entry:
%c = add i8 %a, 3
br label %dispatch
dispatch:
switch i8 %a, label %dispatch [
i8 93, label %target93
i8 -111, label %dispatch
]
target93:
ret i8 %c
}
; Negative test. Shouldn't be incorrectly optimized to "ret i1 false".
define i1 @test20(i64 %a) {
; CHECK-LABEL: @test20(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[B:%.*]] = and i64 [[A:%.*]], 7
; CHECK-NEXT: br label [[DISPATCH:%.*]]
; CHECK: dispatch:
; CHECK-NEXT: switch i64 [[A]], label [[DEFAULT:%.*]] [
; CHECK-NEXT: i64 0, label [[EXIT2:%.*]]
; CHECK-NEXT: i64 -2147483647, label [[EXIT2]]
; CHECK-NEXT: ]
; CHECK: default:
; CHECK-NEXT: [[C:%.*]] = icmp eq i64 [[B]], 0
; CHECK-NEXT: br label [[EXIT:%.*]]
; CHECK: exit:
; CHECK-NEXT: ret i1 [[C]]
; CHECK: exit2:
; CHECK-NEXT: ret i1 false
;
entry:
%b = and i64 %a, 7
br label %dispatch
dispatch:
switch i64 %a, label %default [
i64 0, label %exit2
i64 -2147483647, label %exit2
]
default:
%c = icmp eq i64 %b, 0
br label %exit
exit:
ret i1 %c
exit2:
ret i1 false
}
define i1 @slt(i8 %a, i8 %b) {
; CHECK-LABEL: @slt(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i8 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: call void @llvm.assume(i1 [[CMP]])
; CHECK-NEXT: ret i1 true
;
entry:
%cmp = icmp slt i8 %a, %b
call void @llvm.assume(i1 %cmp)
%res = icmp slt i8 %a, 127
ret i1 %res
}
define i1 @sgt(i8 %a, i8 %b) {
; CHECK-LABEL: @sgt(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i8 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: call void @llvm.assume(i1 [[CMP]])
; CHECK-NEXT: ret i1 true
;
entry:
%cmp = icmp sgt i8 %a, %b
call void @llvm.assume(i1 %cmp)
%res = icmp sgt i8 %a, -128
ret i1 %res
}
define i1 @ult(i8 %a, i8 %b) {
; CHECK-LABEL: @ult(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i8 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: call void @llvm.assume(i1 [[CMP]])
; CHECK-NEXT: ret i1 true
;
entry:
%cmp = icmp ult i8 %a, %b
call void @llvm.assume(i1 %cmp)
%res = icmp ult i8 %a, 255
ret i1 %res
}
define i1 @ugt(i8 %a, i8 %b) {
; CHECK-LABEL: @ugt(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i8 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: call void @llvm.assume(i1 [[CMP]])
; CHECK-NEXT: ret i1 true
;
entry:
%cmp = icmp ugt i8 %a, %b
call void @llvm.assume(i1 %cmp)
%res = icmp ugt i8 %a, 0
ret i1 %res
}
declare void @llvm.assume(i1)
Reference in New Issue View Git Blame Copy Permalink