6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-07-25 13:24:46 +00:00
Code Issues Projects Releases Wiki Activity

Extend ConstantFolding to understand signed overflow variants

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83338 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Phoenix
2009-10-05 22:53:52 +00:00
parent 540b05d227
commit 1614e50d9f
2 changed files with 144 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

121
test/Transforms/ConstProp/overflow-ops.ll
View File

@@ -24,7 +24,6 @@ entry:
; CHECK: ret %i8i1 { i8 6, i1 true }
}
;;-----------------------------
;; usub
;;-----------------------------
@@ -47,7 +46,127 @@ entry:
; CHECK: ret %i8i1 { i8 -2, i1 true }
}
;;-----------------------------
;; sadd
;;-----------------------------
define {i8, i1} @sadd_1() nounwind {
entry:
%t = call {i8, i1} @llvm.sadd.with.overflow.i8(i8 42, i8 2)
ret {i8, i1} %t
; CHECK: @sadd_1
; CHECK: ret %i8i1 { i8 44, i1 false }
}
define {i8, i1} @sadd_2() nounwind {
entry:
%t = call {i8, i1} @llvm.sadd.with.overflow.i8(i8 120, i8 10)
ret {i8, i1} %t
; CHECK: @sadd_2
; CHECK: ret %i8i1 { i8 -126, i1 true }
}
define {i8, i1} @sadd_3() nounwind {
entry:
%t = call {i8, i1} @llvm.sadd.with.overflow.i8(i8 -120, i8 10)
ret {i8, i1} %t
; CHECK: @sadd_3
; CHECK: ret %i8i1 { i8 -110, i1 false }
}
define {i8, i1} @sadd_4() nounwind {
entry:
%t = call {i8, i1} @llvm.sadd.with.overflow.i8(i8 -120, i8 -10)
ret {i8, i1} %t
; CHECK: @sadd_4
; CHECK: ret %i8i1 { i8 126, i1 true }
}
define {i8, i1} @sadd_5() nounwind {
entry:
%t = call {i8, i1} @llvm.sadd.with.overflow.i8(i8 2, i8 -10)
ret {i8, i1} %t
; CHECK: @sadd_5
; CHECK: ret %i8i1 { i8 -8, i1 false }
}
;;-----------------------------
;; ssub
;;-----------------------------
define {i8, i1} @ssub_1() nounwind {
entry:
%t = call {i8, i1} @llvm.ssub.with.overflow.i8(i8 4, i8 2)
ret {i8, i1} %t
; CHECK: @ssub_1
; CHECK: ret %i8i1 { i8 2, i1 false }
}
define {i8, i1} @ssub_2() nounwind {
entry:
%t = call {i8, i1} @llvm.ssub.with.overflow.i8(i8 4, i8 6)
ret {i8, i1} %t
; CHECK: @ssub_2
; CHECK: ret %i8i1 { i8 -2, i1 false }
}
define {i8, i1} @ssub_3() nounwind {
entry:
%t = call {i8, i1} @llvm.ssub.with.overflow.i8(i8 -10, i8 120)
ret {i8, i1} %t
; CHECK: @ssub_3
; CHECK: ret %i8i1 { i8 126, i1 true }
}
define {i8, i1} @ssub_3b() nounwind {
entry:
%t = call {i8, i1} @llvm.ssub.with.overflow.i8(i8 -10, i8 10)
ret {i8, i1} %t
; CHECK: @ssub_3b
; CHECK: ret %i8i1 { i8 -20, i1 false }
}
define {i8, i1} @ssub_4() nounwind {
entry:
%t = call {i8, i1} @llvm.ssub.with.overflow.i8(i8 120, i8 -10)
ret {i8, i1} %t
; CHECK: @ssub_4
; CHECK: ret %i8i1 { i8 -126, i1 true }
}
define {i8, i1} @ssub_4b() nounwind {
entry:
%t = call {i8, i1} @llvm.ssub.with.overflow.i8(i8 20, i8 -10)
ret {i8, i1} %t
; CHECK: @ssub_4b
; CHECK: ret %i8i1 { i8 30, i1 false }
}
define {i8, i1} @ssub_5() nounwind {
entry:
%t = call {i8, i1} @llvm.ssub.with.overflow.i8(i8 -20, i8 -10)
ret {i8, i1} %t
; CHECK: @ssub_5
; CHECK: ret %i8i1 { i8 -10, i1 false }
}
declare {i8, i1} @llvm.uadd.with.overflow.i8(i8, i8)
declare {i8, i1} @llvm.usub.with.overflow.i8(i8, i8)
declare {i8, i1} @llvm.sadd.with.overflow.i8(i8, i8)
declare {i8, i1} @llvm.ssub.with.overflow.i8(i8, i8)