mirror of
https://github.com/RPCSX/llvm.git
synced 2024-11-24 20:29:53 +00:00
cc714e2142
The personality routine currently lives in the LandingPadInst. This isn't desirable because: - All LandingPadInsts in the same function must have the same personality routine. This means that each LandingPadInst beyond the first has an operand which produces no additional information. - There is ongoing work to introduce EH IR constructs other than LandingPadInst. Moving the personality routine off of any one particular Instruction and onto the parent function seems a lot better than have N different places a personality function can sneak onto an exceptional function. Differential Revision: http://reviews.llvm.org/D10429 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@239940 91177308-0d34-0410-b5e6-96231b3b80d8
119 lines
2.9 KiB
LLVM
119 lines
2.9 KiB
LLVM
; RUN: opt < %s -instcombine -S | FileCheck %s
|
|
|
|
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
|
|
|
|
; CHECK-LABEL: @oppositesign
|
|
; CHECK: add nsw i16 %a, %b
|
|
define i16 @oppositesign(i16 %x, i16 %y) {
|
|
; %a is negative, %b is positive
|
|
%a = or i16 %x, 32768
|
|
%b = and i16 %y, 32767
|
|
%c = add i16 %a, %b
|
|
ret i16 %c
|
|
}
|
|
|
|
define i16 @zero_sign_bit(i16 %a) {
|
|
; CHECK-LABEL: @zero_sign_bit(
|
|
; CHECK-NEXT: and
|
|
; CHECK-NEXT: add nuw
|
|
; CHECK-NEXT: ret
|
|
%1 = and i16 %a, 32767
|
|
%2 = add i16 %1, 512
|
|
ret i16 %2
|
|
}
|
|
|
|
define i16 @zero_sign_bit2(i16 %a, i16 %b) {
|
|
; CHECK-LABEL: @zero_sign_bit2(
|
|
; CHECK-NEXT: and
|
|
; CHECK-NEXT: and
|
|
; CHECK-NEXT: add nuw
|
|
; CHECK-NEXT: ret
|
|
%1 = and i16 %a, 32767
|
|
%2 = and i16 %b, 32767
|
|
%3 = add i16 %1, %2
|
|
ret i16 %3
|
|
}
|
|
|
|
declare i16 @bounded(i16 %input);
|
|
declare i32 @__gxx_personality_v0(...);
|
|
!0 = !{i16 0, i16 32768} ; [0, 32767]
|
|
!1 = !{i16 0, i16 32769} ; [0, 32768]
|
|
|
|
define i16 @add_bounded_values(i16 %a, i16 %b) personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
|
|
; CHECK-LABEL: @add_bounded_values(
|
|
entry:
|
|
%c = call i16 @bounded(i16 %a), !range !0
|
|
%d = invoke i16 @bounded(i16 %b) to label %cont unwind label %lpad, !range !0
|
|
cont:
|
|
; %c and %d are in [0, 32767]. Therefore, %c + %d doesn't unsigned overflow.
|
|
%e = add i16 %c, %d
|
|
; CHECK: add nuw i16 %c, %d
|
|
ret i16 %e
|
|
lpad:
|
|
%0 = landingpad { i8*, i32 }
|
|
filter [0 x i8*] zeroinitializer
|
|
ret i16 42
|
|
}
|
|
|
|
define i16 @add_bounded_values_2(i16 %a, i16 %b) personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
|
|
; CHECK-LABEL: @add_bounded_values_2(
|
|
entry:
|
|
%c = call i16 @bounded(i16 %a), !range !1
|
|
%d = invoke i16 @bounded(i16 %b) to label %cont unwind label %lpad, !range !1
|
|
cont:
|
|
; Similar to add_bounded_values, but %c and %d are in [0, 32768]. Therefore,
|
|
; %c + %d may unsigned overflow and we cannot add NUW.
|
|
%e = add i16 %c, %d
|
|
; CHECK: add i16 %c, %d
|
|
ret i16 %e
|
|
lpad:
|
|
%0 = landingpad { i8*, i32 }
|
|
filter [0 x i8*] zeroinitializer
|
|
ret i16 42
|
|
}
|
|
|
|
; CHECK-LABEL: @ripple_nsw1
|
|
; CHECK: add nsw i16 %a, %b
|
|
define i16 @ripple_nsw1(i16 %x, i16 %y) {
|
|
; %a has at most one bit set
|
|
%a = and i16 %y, 1
|
|
|
|
; %b has a 0 bit other than the sign bit
|
|
%b = and i16 %x, 49151
|
|
|
|
%c = add i16 %a, %b
|
|
ret i16 %c
|
|
}
|
|
|
|
; Like the previous test, but flip %a and %b
|
|
; CHECK-LABEL: @ripple_nsw2
|
|
; CHECK: add nsw i16 %b, %a
|
|
define i16 @ripple_nsw2(i16 %x, i16 %y) {
|
|
%a = and i16 %y, 1
|
|
%b = and i16 %x, 49151
|
|
%c = add i16 %b, %a
|
|
ret i16 %c
|
|
}
|
|
|
|
; CHECK-LABEL: @ripple_no_nsw1
|
|
; CHECK: add i32 %a, %x
|
|
define i32 @ripple_no_nsw1(i32 %x, i32 %y) {
|
|
; We know nothing about %x
|
|
%a = and i32 %y, 1
|
|
%b = add i32 %a, %x
|
|
ret i32 %b
|
|
}
|
|
|
|
; CHECK-LABEL: @ripple_no_nsw2
|
|
; CHECK: add nuw i16 %a, %b
|
|
define i16 @ripple_no_nsw2(i16 %x, i16 %y) {
|
|
; %a has at most one bit set
|
|
%a = and i16 %y, 1
|
|
|
|
; %b has a 0 bit, but it is the sign bit
|
|
%b = and i16 %x, 32767
|
|
|
|
%c = add i16 %a, %b
|
|
ret i16 %c
|
|
}
|