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Add some testing for thumb1 and thumb2 inline asm immediate constraints 

and fix a couple of bugs on inspection.

Also fixes PR26061.

llvm-svn: 257122
This commit is contained in:
Eric Christopher 2016-01-08 00:34:44 +00:00
parent 26d84e8097
commit b793230797
3 changed files with 53 additions and 2 deletions
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4
llvm/lib/Target/ARM/ARMISelLowering.cpp
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@ -11475,7 +11475,7 @@ void ARMTargetLowering::LowerAsmOperandForConstraint(SDValue Op,
return;
case 'J':
if (Subtarget->isThumb()) { // FIXME thumb2
if (Subtarget->isThumb1Only()) {
// This must be a constant between -255 and -1, for negated ADD
// immediates. This can be used in GCC with an "n" modifier that
// prints the negated value, for use with SUB instructions. It is
@ -11544,7 +11544,7 @@ void ARMTargetLowering::LowerAsmOperandForConstraint(SDValue Op,
return;
case 'M':
if (Subtarget->isThumb()) { // FIXME thumb2
if (Subtarget->isThumb1Only()) {
// This must be a multiple of 4 between 0 and 1020, for
// ADD sp + immediate.
if ((CVal >= 0 && CVal <= 1020) && ((CVal & 3) == 0))

20
llvm/test/CodeGen/ARM/inlineasm-imm-thumb.ll Normal file
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@ -0,0 +1,20 @@
; RUN: llc -mtriple=thumbv5-none-linux-gnueabi -no-integrated-as %s -o /dev/null
; Test thumb-mode "I" constraint, for any Data Processing immediate.
define void @testI() {
tail call void asm sideeffect ".word $0", "I"( i32 255 ) nounwind
ret void
}
; Test thumb-mode "J" constraint, for compatibility with unknown use in GCC.
define void @testJ() {
tail call void asm sideeffect ".word $0", "J"( i32 -254 ) nounwind
ret void
}
; Test thumb-mode "L" constraint, for negated Data Processing immediates.
define void @testL() {
tail call void asm sideeffect ".word $0", "L"( i32 -7 ) nounwind
ret void
}

31
llvm/test/CodeGen/ARM/inlineasm-imm-thumb2.ll Normal file
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@ -0,0 +1,31 @@
; RUN: llc -mtriple=thumbv7-linux-gnu -no-integrated-as %s -o /dev/null
; Test thumb2-mode "I" constraint, for any Data Processing immediate.
define i32 @testI(i32 %x) {
%y = call i32 asm "add $0, $1, $2", "=r,r,I"( i32 %x, i32 65280 ) nounwind
ret i32 %y
}
; Test thumb2-mode "J" constraint, for compatibility with unknown use in GCC.
define void @testJ() {
tail call void asm sideeffect ".word $0", "J"( i32 4080 ) nounwind
ret void
}
; Test thumb2-mode "K" constraint, for bitwise inverted Data Processing immediates.
define void @testK() {
tail call void asm sideeffect ".word $0", "K"( i32 16777215 ) nounwind
ret void
}
; Test thumb2-mode "L" constraint, for negated Data Processing immediates.
define void @testL() {
tail call void asm sideeffect ".word $0", "L"( i32 -65280 ) nounwind
ret void
}
; Test thumb2-mode "M" constraint, for value between 0 and 32.
define i32 @testM(i32 %x) {
%y = call i32 asm "lsl $0, $1, $2", "=r,r,M"( i32 %x, i32 31 ) nounwind
ret i32 %y
}