forked from OSchip/llvm-project
[InstCombine] auto-generate full checks for icmp overflow tests; NFC
llvm-svn: 348274
This commit is contained in:
Sanjay Patel
parent
a40bf9fff7
commit
882555628b
|
|
@ -1,17 +1,27 @@
|
|||
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
|
||||
; RUN: opt -S -instcombine < %s | FileCheck %s
|
||||
; <rdar://problem/8558713>
|
||||
|
||||
declare void @throwAnExceptionOrWhatever()
|
||||
|
||||
; CHECK-LABEL: @test1(
|
||||
define i32 @test1(i32 %a, i32 %b) nounwind ssp {
|
||||
; CHECK-LABEL: @test1(
|
||||
; CHECK-NEXT: entry:
|
||||
; CHECK-NEXT: [[SADD:%.*]] = call { i32, i1 } @llvm.sadd.with.overflow.i32(i32 [[B:%.*]], i32 [[A:%.*]])
|
||||
; CHECK-NEXT: [[SADD_RESULT:%.*]] = extractvalue { i32, i1 } [[SADD]], 0
|
||||
; CHECK-NEXT: [[TMP0:%.*]] = extractvalue { i32, i1 } [[SADD]], 1
|
||||
; CHECK-NEXT: br i1 [[TMP0]], label [[IF_THEN:%.*]], label [[IF_END:%.*]]
|
||||
; CHECK: if.then:
|
||||
; CHECK-NEXT: tail call void @throwAnExceptionOrWhatever() #2
|
||||
; CHECK-NEXT: br label [[IF_END]]
|
||||
; CHECK: if.end:
|
||||
; CHECK-NEXT: ret i32 [[SADD_RESULT]]
|
||||
;
|
||||
entry:
|
||||
; CHECK-NOT: sext
|
||||
%conv = sext i32 %a to i64
|
||||
%conv2 = sext i32 %b to i64
|
||||
%add = add nsw i64 %conv2, %conv
|
||||
%add.off = add i64 %add, 2147483648
|
||||
; CHECK: llvm.sadd.with.overflow.i32
|
||||
%0 = icmp ugt i64 %add.off, 4294967295
|
||||
br i1 %0, label %if.then, label %if.end
|
||||
|
||||
|
|
@ -20,26 +30,37 @@ if.then:
|
|||
br label %if.end
|
||||
|
||||
if.end:
|
||||
; CHECK-NOT: trunc
|
||||
%conv9 = trunc i64 %add to i32
|
||||
; CHECK: ret i32
|
||||
ret i32 %conv9
|
||||
}
|
||||
|
||||
; CHECK-LABEL: @test2(
|
||||
; This form should not be promoted for two reasons: 1) it is unprofitable to
|
||||
; promote it since the add.off instruction has another use, and 2) it is unsafe
|
||||
; because the add-with-off makes the high bits of the original add live.
|
||||
|
||||
define i32 @test2(i32 %a, i32 %b, i64* %P) nounwind ssp {
|
||||
; CHECK-LABEL: @test2(
|
||||
; CHECK-NEXT: entry:
|
||||
; CHECK-NEXT: [[CONV:%.*]] = sext i32 [[A:%.*]] to i64
|
||||
; CHECK-NEXT: [[CONV2:%.*]] = sext i32 [[B:%.*]] to i64
|
||||
; CHECK-NEXT: [[ADD:%.*]] = add nsw i64 [[CONV2]], [[CONV]]
|
||||
; CHECK-NEXT: [[ADD_OFF:%.*]] = add nsw i64 [[ADD]], 2147483648
|
||||
; CHECK-NEXT: store i64 [[ADD_OFF]], i64* [[P:%.*]], align 4
|
||||
; CHECK-NEXT: [[TMP0:%.*]] = icmp ugt i64 [[ADD_OFF]], 4294967295
|
||||
; CHECK-NEXT: br i1 [[TMP0]], label [[IF_THEN:%.*]], label [[IF_END:%.*]]
|
||||
; CHECK: if.then:
|
||||
; CHECK-NEXT: tail call void @throwAnExceptionOrWhatever() #2
|
||||
; CHECK-NEXT: br label [[IF_END]]
|
||||
; CHECK: if.end:
|
||||
; CHECK-NEXT: [[CONV9:%.*]] = trunc i64 [[ADD]] to i32
|
||||
; CHECK-NEXT: ret i32 [[CONV9]]
|
||||
;
|
||||
entry:
|
||||
%conv = sext i32 %a to i64
|
||||
%conv2 = sext i32 %b to i64
|
||||
%add = add nsw i64 %conv2, %conv
|
||||
%add.off = add i64 %add, 2147483648
|
||||
|
||||
store i64 %add.off, i64* %P
|
||||
|
||||
; CHECK-NOT: llvm.sadd.with.overflow
|
||||
%0 = icmp ugt i64 %add.off, 4294967295
|
||||
br i1 %0, label %if.then, label %if.end
|
||||
|
||||
|
|
@ -49,21 +70,32 @@ if.then:
|
|||
|
||||
if.end:
|
||||
%conv9 = trunc i64 %add to i32
|
||||
; CHECK: ret i32
|
||||
ret i32 %conv9
|
||||
}
|
||||
|
||||
; CHECK: test3
|
||||
; PR8816
|
||||
; This is illegal to transform because the high bits of the original add are
|
||||
; live out.
|
||||
define i64 @test3(i32 %a, i32 %b) nounwind ssp {
|
||||
; CHECK-LABEL: @test3(
|
||||
; CHECK-NEXT: entry:
|
||||
; CHECK-NEXT: [[CONV:%.*]] = sext i32 [[A:%.*]] to i64
|
||||
; CHECK-NEXT: [[CONV2:%.*]] = sext i32 [[B:%.*]] to i64
|
||||
; CHECK-NEXT: [[ADD:%.*]] = add nsw i64 [[CONV2]], [[CONV]]
|
||||
; CHECK-NEXT: [[ADD_OFF:%.*]] = add nsw i64 [[ADD]], 2147483648
|
||||
; CHECK-NEXT: [[TMP0:%.*]] = icmp ugt i64 [[ADD_OFF]], 4294967295
|
||||
; CHECK-NEXT: br i1 [[TMP0]], label [[IF_THEN:%.*]], label [[IF_END:%.*]]
|
||||
; CHECK: if.then:
|
||||
; CHECK-NEXT: tail call void @throwAnExceptionOrWhatever() #2
|
||||
; CHECK-NEXT: br label [[IF_END]]
|
||||
; CHECK: if.end:
|
||||
; CHECK-NEXT: ret i64 [[ADD]]
|
||||
;
|
||||
entry:
|
||||
%conv = sext i32 %a to i64
|
||||
%conv2 = sext i32 %b to i64
|
||||
%add = add nsw i64 %conv2, %conv
|
||||
%add.off = add i64 %add, 2147483648
|
||||
; CHECK-NOT: llvm.sadd.with.overflow
|
||||
%0 = icmp ugt i64 %add.off, 4294967295
|
||||
br i1 %0, label %if.then, label %if.end
|
||||
|
||||
|
|
@ -73,12 +105,23 @@ if.then:
|
|||
|
||||
if.end:
|
||||
ret i64 %add
|
||||
; CHECK: ret i64
|
||||
}
|
||||
|
||||
; CHECK-LABEL: @test4(
|
||||
; Should be able to form an i8 sadd computed in an i32.
|
||||
|
||||
define zeroext i8 @test4(i8 signext %a, i8 signext %b) nounwind ssp {
|
||||
; CHECK-LABEL: @test4(
|
||||
; CHECK-NEXT: entry:
|
||||
; CHECK-NEXT: [[SADD:%.*]] = call { i8, i1 } @llvm.sadd.with.overflow.i8(i8 [[B:%.*]], i8 [[A:%.*]])
|
||||
; CHECK-NEXT: [[CMP:%.*]] = extractvalue { i8, i1 } [[SADD]], 1
|
||||
; CHECK-NEXT: br i1 [[CMP]], label [[IF_THEN:%.*]], label [[IF_END:%.*]]
|
||||
; CHECK: if.then:
|
||||
; CHECK-NEXT: tail call void @throwAnExceptionOrWhatever() #2
|
||||
; CHECK-NEXT: unreachable
|
||||
; CHECK: if.end:
|
||||
; CHECK-NEXT: [[SADD_RESULT:%.*]] = extractvalue { i8, i1 } [[SADD]], 0
|
||||
; CHECK-NEXT: ret i8 [[SADD_RESULT]]
|
||||
;
|
||||
entry:
|
||||
%conv = sext i8 %a to i32
|
||||
%conv2 = sext i8 %b to i32
|
||||
|
|
@ -86,27 +129,34 @@ entry:
|
|||
%add4 = add nsw i32 %add, 128
|
||||
%cmp = icmp ugt i32 %add4, 255
|
||||
br i1 %cmp, label %if.then, label %if.end
|
||||
; CHECK: llvm.sadd.with.overflow.i8
|
||||
if.then: ; preds = %entry
|
||||
if.then:
|
||||
tail call void @throwAnExceptionOrWhatever() nounwind
|
||||
unreachable
|
||||
|
||||
if.end: ; preds = %entry
|
||||
if.end:
|
||||
%conv7 = trunc i32 %add to i8
|
||||
ret i8 %conv7
|
||||
; CHECK: ret i8
|
||||
}
|
||||
|
||||
; CHECK-LABEL: @test8(
|
||||
; PR11438
|
||||
; This is @test1, but the operands are not sign-extended. Make sure
|
||||
; we don't transform this case.
|
||||
|
||||
define i32 @test8(i64 %a, i64 %b) nounwind ssp {
|
||||
; CHECK-LABEL: @test8(
|
||||
; CHECK-NEXT: entry:
|
||||
; CHECK-NEXT: [[ADD:%.*]] = add i64 [[A:%.*]], [[B:%.*]]
|
||||
; CHECK-NEXT: [[ADD_OFF:%.*]] = add i64 [[ADD]], 2147483648
|
||||
; CHECK-NEXT: [[TMP0:%.*]] = icmp ugt i64 [[ADD_OFF]], 4294967295
|
||||
; CHECK-NEXT: br i1 [[TMP0]], label [[IF_THEN:%.*]], label [[IF_END:%.*]]
|
||||
; CHECK: if.then:
|
||||
; CHECK-NEXT: tail call void @throwAnExceptionOrWhatever() #2
|
||||
; CHECK-NEXT: br label [[IF_END]]
|
||||
; CHECK: if.end:
|
||||
; CHECK-NEXT: [[CONV9:%.*]] = trunc i64 [[ADD]] to i32
|
||||
; CHECK-NEXT: ret i32 [[CONV9]]
|
||||
;
|
||||
entry:
|
||||
; CHECK-NOT: llvm.sadd
|
||||
; CHECK: add i64 %a, %b
|
||||
; CHECK-NOT: llvm.sadd
|
||||
; CHECK: ret
|
||||
%add = add i64 %a, %b
|
||||
%add.off = add i64 %add, 2147483648
|
||||
%0 = icmp ugt i64 %add.off, 4294967295
|
||||
|
|
@ -120,3 +170,4 @@ if.end:
|
|||
%conv9 = trunc i64 %add to i32
|
||||
ret i32 %conv9
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue