maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity
llvm-project/llvm/test/CodeGen/X86/fold-add.ll

Ignoring revisions in .git-blame-ignore-revs. Click here to bypass and see the normal blame view.

106 lines
3.6 KiB
LLVM
Raw Normal View History

[X86][test] Improve global address offset folding tests
2020-12-30 13:26:30 +08:00
; RUN: llc -mtriple=x86_64 -relocation-model=static < %s | FileCheck --check-prefixes=CHECK,STATIC %s
; RUN: llc -mtriple=x86_64 -relocation-model=pic < %s | FileCheck --check-prefixes=CHECK,PIC %s
; RUN: llc -mtriple=x86_64 -code-model=medium -relocation-model=static < %s | FileCheck --check-prefixes=CHECK,MSTATIC %s
; RUN: llc -mtriple=x86_64 -code-model=medium -relocation-model=pic < %s | FileCheck --check-prefixes=CHECK,MPIC %s
Enhance address-mode folding of ISD::ADD to handle cases where the operands can't both be fully folded at the same time. For example, in the included testcase, a global variable is being added with an add of two values. The global variable wants RIP-relative addressing, so it can't share the address with another base register, but it's still possible to fold the initial add. llvm-svn: 66865
2009-03-13 10:25:09 +08:00
[X86][test] Improve global address offset folding tests
2020-12-30 13:26:30 +08:00
@foo = internal global i32 0
Enhance address-mode folding of ISD::ADD to handle cases where the operands can't both be fully folded at the same time. For example, in the included testcase, a global variable is being added with an add of two values. The global variable wants RIP-relative addressing, so it can't share the address with another base register, but it's still possible to fold the initial add. llvm-svn: 66865
2009-03-13 10:25:09 +08:00
[X86][test] Improve global address offset folding tests
2020-12-30 13:26:30 +08:00
define dso_local i64 @zero() #0 {
; CHECK-LABEL: zero:
; CHECK: # %bb.0:
; STATIC-NEXT: movl $foo, %eax
; STATIC-NEXT: retq
; PIC-NEXT: leaq foo(%rip), %rax
; PIC-NEXT: retq
; MSTATIC-NEXT: movabsq $foo, %rax
; MSTATIC-NEXT: retq
; MPIC-NEXT: leaq _GLOBAL_OFFSET_TABLE_(%rip), %rcx
; MPIC-NEXT: movabsq $foo@GOTOFF, %rax
; MPIC-NEXT: addq %rcx, %rax
entry:
ret i64 add (i64 ptrtoint (i32* @foo to i64), i64 0)
}
define dso_local i64 @one() #0 {
; CHECK-LABEL: one:
; CHECK: # %bb.0:
; STATIC-NEXT: movl $foo+1, %eax
; PIC-NEXT: leaq foo+1(%rip), %rax
; MSTATIC-NEXT: movabsq $foo, %rax
; MSTATIC-NEXT: incq %rax
; MPIC-NEXT: leaq _GLOBAL_OFFSET_TABLE_(%rip), %rax
; MPIC-NEXT: movabsq $foo@GOTOFF, %rcx
; MPIC-NEXT: leaq 1(%rax,%rcx), %rax
entry:
ret i64 add (i64 ptrtoint (i32* @foo to i64), i64 1)
}
;; Check we don't fold a large offset into leaq, otherwise
;; the large r_addend can easily cause a relocation overflow.
define dso_local i64 @large() #0 {
; CHECK-LABEL: large:
; CHECK: # %bb.0:
; STATIC-NEXT: movl $1701208431, %eax
; STATIC-NEXT: leaq foo(%rax), %rax
; PIC-NEXT: leaq foo(%rip), %rax
; PIC-NEXT: addq $1701208431, %rax
; MSTATIC-NEXT: movabsq $foo, %rax
; MSTATIC-NEXT: addq $1701208431, %rax
; MSTATIC-NEXT: retq
; MPIC-NEXT: leaq _GLOBAL_OFFSET_TABLE_(%rip), %rax
; MPIC-NEXT: movabsq $foo@GOTOFF, %rcx
; MPIC-NEXT: leaq 1701208431(%rax,%rcx), %rax
entry:
ret i64 add (i64 ptrtoint (i32* @foo to i64), i64 1701208431)
}
FileCheck-ize llvm-svn: 134338
2011-07-03 04:42:33 +08:00
[X86][test] Improve global address offset folding tests
2020-12-30 13:26:30 +08:00
define dso_local i64 @neg_1() #0 {
; CHECK-LABEL: neg_1:
; CHECK: # %bb.0:
; STATIC-NEXT: movl $foo-1, %eax
; PIC-NEXT: leaq foo-1(%rip), %rax
; MSTATIC-NEXT: movabsq $foo, %rax
; MSTATIC-NEXT: decq %rax
; MPIC-NEXT: leaq _GLOBAL_OFFSET_TABLE_(%rip), %rax
; MPIC-NEXT: movabsq $foo@GOTOFF, %rcx
; MPIC-NEXT: leaq -1(%rax,%rcx), %rax
Enhance address-mode folding of ISD::ADD to handle cases where the operands can't both be fully folded at the same time. For example, in the included testcase, a global variable is being added with an add of two values. The global variable wants RIP-relative addressing, so it can't share the address with another base register, but it's still possible to fold the initial add. llvm-svn: 66865
2009-03-13 10:25:09 +08:00
entry:
[X86][test] Improve global address offset folding tests
2020-12-30 13:26:30 +08:00
ret i64 add (i64 ptrtoint (i32* @foo to i64), i64 -1)
Enhance address-mode folding of ISD::ADD to handle cases where the operands can't both be fully folded at the same time. For example, in the included testcase, a global variable is being added with an add of two values. The global variable wants RIP-relative addressing, so it can't share the address with another base register, but it's still possible to fold the initial add. llvm-svn: 66865
2009-03-13 10:25:09 +08:00
}
[X86][test] Improve global address offset folding tests
2020-12-30 13:26:30 +08:00
define dso_local i64 @neg_0x80000000() #0 {
; CHECK-LABEL: neg_0x80000000:
; CHECK: # %bb.0:
; STATIC-NEXT: movl $foo-2147483648, %eax
; PIC-NEXT: leaq foo-2147483648(%rip), %rax
; MSTATIC-NEXT: movabsq $foo, %rax
; MSTATIC-NEXT: addq $-2147483648, %rax
; MPIC-NEXT: leaq _GLOBAL_OFFSET_TABLE_(%rip), %rax
; MPIC-NEXT: movabsq $foo@GOTOFF, %rcx
; MPIC-NEXT: leaq -2147483648(%rax,%rcx), %rax
entry:
ret i64 add (i64 ptrtoint (i32* @foo to i64), i64 -2147483648)
}
define dso_local i64 @neg_0x80000001() #0 {
; CHECK-LABEL: neg_0x80000001:
; CHECK: # %bb.0:
; STATIC-NEXT: movabsq $-2147483649, %rax
; STATIC-NEXT: leaq foo(%rax), %rax
; PIC-NEXT: leaq foo(%rip), %rcx
; PIC-NEXT: movabsq $-2147483649, %rax
; PIC-NEXT: addq %rcx, %rax
; MSTATIC-NEXT: movabsq $-2147483649, %rcx
; MSTATIC-NEXT: movabsq $foo, %rax
; MSTATIC-NEXT: addq %rcx, %rax
; MPIC-NEXT: leaq _GLOBAL_OFFSET_TABLE_(%rip), %rax
; MPIC-NEXT: movabsq $foo@GOTOFF, %rcx
; MPIC-NEXT: addq %rax, %rcx
; MPIC-NEXT: movabsq $-2147483649, %rax
; MPIC-NEXT: addq %rcx, %rax
entry:
ret i64 add (i64 ptrtoint (i32* @foo to i64), i64 -2147483649)
}
attributes #0 = { nounwind }