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https://github.com/c64scene-ar/llvm-6502.git
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f715d51769
These are used by MachO only at the moment, and (much like the existing MOVW/MOVT set) work around the fact that the labels used in the actual instructions often contain PC-dependent components, which means that repeatedly materialising the same global can't be CSEed. With small modifications, it could be adapted to how ELF finds the address of _GLOBAL_OFFSET_TABLE_, which would give similar benefits in PIC mode there. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@196090 91177308-0d34-0410-b5e6-96231b3b80d8
62 lines
2.0 KiB
LLVM
62 lines
2.0 KiB
LLVM
; RUN: llc -mtriple=thumbv6m-apple-darwin-eabi -relocation-model=pic -o - %s | FileCheck %s --check-prefix=CHECK-THUMB-PIC
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; RUN: llc -mtriple=arm-apple-darwin-eabi -relocation-model=pic -o - %s | FileCheck %s --check-prefix=CHECK-ARM-PIC
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; RUN: llc -mtriple=thumbv6m-apple-darwin-eabi -relocation-model=dynamic-no-pic -o - %s | FileCheck %s --check-prefix=CHECK-DYNAMIC
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; RUN: llc -mtriple=arm-apple-darwin-eabi -relocation-model=dynamic-no-pic -o - %s | FileCheck %s --check-prefix=CHECK-DYNAMIC
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; RUN: llc -mtriple=thumbv6m-apple-darwin-eabi -relocation-model=static -o - %s | FileCheck %s --check-prefix=CHECK-STATIC
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; RUN: llc -mtriple=arm-apple-darwin-eabi -relocation-model=static -o - %s | FileCheck %s --check-prefix=CHECK-STATIC
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@var = global [16 x i32] zeroinitializer
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declare void @bar(i32*)
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define void @foo() {
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%flag = load i32* getelementptr inbounds([16 x i32]* @var, i32 0, i32 1)
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%tst = icmp eq i32 %flag, 0
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br i1 %tst, label %true, label %false
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true:
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tail call void @bar(i32* getelementptr inbounds([16 x i32]* @var, i32 0, i32 4))
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ret void
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false:
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ret void
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}
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; CHECK-THUMB-PIC-LABEL: foo:
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; CHECK-THUMB-PIC: ldr r0, LCPI0_0
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; CHECK-THUMB-PIC: LPC0_0:
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; CHECK-THUMB-PIC-NEXT: add r0, pc
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; CHECK-THUMB-PIC: ldr {{r[1-9][0-9]?}}, [r0, #4]
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; CHECK-THUMB-PIC: LCPI0_0:
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; CHECK-THUMB-PIC-NEXT: .long _var-(LPC0_0+4)
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; CHECK-THUMB-PIC-NOT: LCPI0_1
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; CHECK-ARM-PIC-LABEL: foo:
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; CHECK-ARM-PIC: ldr [[VAR_OFFSET:r[0-9]+]], LCPI0_0
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; CHECK-ARM-PIC: LPC0_0:
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; CHECK-ARM-PIC-NEXT: ldr r0, [pc, [[VAR_OFFSET]]]
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; CHECK-ARM-PIC: ldr {{r[1-9][0-9]?}}, [r0, #4]
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; CHECK-ARM-PIC: LCPI0_0:
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; CHECK-ARM-PIC-NEXT: .long _var-(LPC0_0+8)
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; CHECK-ARM-PIC-NOT: LCPI0_1
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; CHECK-DYNAMIC-LABEL: foo:
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; CHECK-DYNAMIC: ldr r0, LCPI0_0
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; CHECK-DYNAMIC: ldr {{r[1-9][0-9]?}}, [r0, #4]
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; CHECK-DYNAMIC: LCPI0_0:
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; CHECK-DYNAMIC-NEXT: .long _var
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; CHECK-DYNAMIC-NOT: LCPI0_1
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; CHECK-STATIC-LABEL: foo:
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; CHECK-STATIC: ldr r0, LCPI0_0
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; CHECK-STATIC: ldr {{r[1-9][0-9]?}}, [r0, #4]
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; CHECK-STATIC: LCPI0_0:
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; CHECK-STATIC-NEXT: .long _var{{$}}
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; CHECK-STATIC-NOT: LCPI0_1
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