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In thumb mode, r7 is used as frame register. This fixes pr4681.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78086 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2009-08-04 18:46:17 +00:00
parent b84f3d427c
commit 3425df44b5
2 changed files with 40 additions and 0 deletions
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11
lib/Target/ARM/ARMRegisterInfo.td
View File

@ -160,6 +160,13 @@ def GPR : RegisterClass<"ARM", [i32], 32, [R0, R1, R2, R3, R4, R5, R6,
ARM::R4, ARM::R5, ARM::R6,
ARM::R8, ARM::R10,ARM::R11,
ARM::R7 };
// FP is R7, R9 is available as callee-saved register.
// This is used by non-Darwin platform in Thumb mode.
static const unsigned ARM_GPR_AO_5[] = {
ARM::R0, ARM::R1, ARM::R2, ARM::R3,
ARM::R12,ARM::LR,
ARM::R4, ARM::R5, ARM::R6,
ARM::R8, ARM::R9, ARM::R10,ARM::R11,ARM::R7 };
GPRClass::iterator
GPRClass::allocation_order_begin(const MachineFunction &MF) const {
@ -173,6 +180,8 @@ def GPR : RegisterClass<"ARM", [i32], 32, [R0, R1, R2, R3, R4, R5, R6,
} else {
if (Subtarget.isR9Reserved())
return ARM_GPR_AO_2;
else if (Subtarget.isThumb())
return ARM_GPR_AO_5;
else
return ARM_GPR_AO_1;
}
@ -193,6 +202,8 @@ def GPR : RegisterClass<"ARM", [i32], 32, [R0, R1, R2, R3, R4, R5, R6,
} else {
if (Subtarget.isR9Reserved())
I = ARM_GPR_AO_2 + (sizeof(ARM_GPR_AO_2)/sizeof(unsigned));
else if (Subtarget.isThumb())
I = ARM_GPR_AO_5 + (sizeof(ARM_GPR_AO_5)/sizeof(unsigned));
else
I = ARM_GPR_AO_1 + (sizeof(ARM_GPR_AO_1)/sizeof(unsigned));
}

29
test/CodeGen/Thumb2/2009-08-04-CoalescerAssert.ll Normal file
View File

@ -0,0 +1,29 @@
; RUN: llvm-as < %s | llc -mtriple=thumbv7-none-linux-gnueabi
; PR4681
%struct.FILE = type { i32, i8*, i8*, i8*, i8*, i8*, i8*, i8*, i8*, i8*, i8*, i8*, %struct._IO_marker*, %struct.FILE*, i32, i32, i32, i16, i8, [1 x i8], i8*, i64, i8*, i8*, i8*, i8*, i32, i32, [40 x i8] }
%struct._IO_marker = type { %struct._IO_marker*, %struct.FILE*, i32 }
@.str2 = external constant [30 x i8], align 1 ; <[30 x i8]*> [#uses=1]
define arm_aapcscc i32 @__mf_heuristic_check(i32 %ptr, i32 %ptr_high) nounwind {
entry:
br i1 undef, label %bb1, label %bb
bb: ; preds = %entry
unreachable
bb1: ; preds = %entry
br i1 undef, label %bb9, label %bb2
bb2: ; preds = %bb1
%0 = call i8* @llvm.frameaddress(i32 0) ; <i8*> [#uses=1]
%1 = call arm_aapcscc i32 (%struct.FILE*, i8*, ...)* @fprintf(%struct.FILE* noalias undef, i8* noalias getelementptr ([30 x i8]* @.str2, i32 0, i32 0), i8* %0, i8* null) nounwind ; <i32> [#uses=0]
unreachable
bb9: ; preds = %bb1
ret i32 undef
}
declare i8* @llvm.frameaddress(i32) nounwind readnone
declare arm_aapcscc i32 @fprintf(%struct.FILE* noalias nocapture, i8* noalias nocapture, ...) nounwind