fe83270ee9
SHF_ARM_PURECODE flag when being built with the -mexecute-only flag. All code sections of an ELF must have the flag set for the final .text section to be execute-only, otherwise the flag gets removed. A HasData flag is added to MCSection to aid in the determination that the section is empty. A virtual setTargetSectionFlags is added to MCELFObjectTargetWriter to allow subclasses to set target specific section flags to be added to sections which we then use in the ARM backend to set SHF_ARM_PURECODE. Patch by Ivan Lozano! Reviewed By: echristo Differential Revision: https://reviews.llvm.org/D48792 llvm-svn: 341593
86 lines
2.7 KiB
LLVM
86 lines
2.7 KiB
LLVM
; RUN: llc -mtriple=thumbv8m.base-eabi -mattr=+execute-only %s -o - | FileCheck --check-prefix=CHECK --check-prefix=CHECK-T2BASE %s
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; RUN: llc -mtriple=thumbv7m-eabi -mattr=+execute-only %s -o - | FileCheck --check-prefix=CHECK --check-prefix=CHECK-T2 %s
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; RUN: llc -mtriple=thumbv8m.main-eabi -mattr=+execute-only %s -o - | FileCheck --check-prefix=CHECK --check-prefix=CHECK-T2 %s
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; CHECK-NOT: {{^ *}}.text{{$}}
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; CHECK: .section .text,"axy",%progbits,unique,0
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@var = global i32 0
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define i32 @global() minsize {
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; CHECK-LABEL: global:
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; CHECK: movw [[GLOBDEST:r[0-9]+]], :lower16:var
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; CHECK: movt [[GLOBDEST]], :upper16:var
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%val = load i32, i32* @var
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ret i32 %val
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}
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define i32 @jump_table(i32 %c, i32 %a, i32 %b) #0 {
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; CHECK-LABEL: jump_table:
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; CHECK-T2: adr.w [[REG_JT:r[0-9]+]], .LJTI1_0
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; CHECK-T2: add.w [[REG_ENTRY:r[0-9]+]], [[REG_JT]], {{r[0-9]+}}, lsl #2
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; CHECK-T2: mov pc, [[REG_ENTRY]]
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; CHECK-T2BASE: lsls [[REG_OFFSET:r[0-9]+]], {{r[0-9]+}}, #2
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; CHECK-T2BASE: adr [[REG_JT:r[0-9]+]], .LJTI1_0
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; CHECK-T2BASE: adds [[REG_ENTRY:r[0-9]+]], [[REG_JT]], [[REG_OFFSET]]
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; CHECK-T2BASE: mov pc, [[REG_ENTRY]]
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; CHECK-LABEL: .LJTI1_0:
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; CHECK-NEXT: b.w
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; CHECK-NEXT: b.w
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; CHECK-NEXT: b.w
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; CHECK-NEXT: b.w
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; CHECK-NEXT: b.w
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; CHECK-NEXT: b.w
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entry:
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switch i32 %c, label %return [
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i32 1, label %sw.bb
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i32 2, label %sw.bb1
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i32 3, label %sw.bb3
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i32 4, label %sw.bb4
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i32 5, label %sw.bb6
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i32 6, label %sw.bb8
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]
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sw.bb: ; preds = %entry
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%add = add nsw i32 %a, 6
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br label %return
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sw.bb1: ; preds = %entry
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%add2 = add nsw i32 %a, 4
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br label %return
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sw.bb3: ; preds = %entry
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%sub = add nsw i32 %a, -3
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br label %return
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sw.bb4: ; preds = %entry
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%add5 = add nsw i32 %b, 5
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br label %return
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sw.bb6: ; preds = %entry
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%add7 = add nsw i32 %a, 1
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br label %return
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sw.bb8: ; preds = %entry
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%add9 = add nsw i32 %a, 2
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br label %return
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return: ; preds = %entry, %sw.bb8, %sw.bb6, %sw.bb4, %sw.bb3, %sw.bb1, %sw.bb
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%retval.0 = phi i32 [ %add9, %sw.bb8 ], [ %add7, %sw.bb6 ], [ %add5, %sw.bb4 ], [ %sub, %sw.bb3 ], [ %add2, %sw.bb1 ], [ %add, %sw.bb ], [ 0, %entry ]
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ret i32 %retval.0
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}
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@.str = private unnamed_addr constant [4 x i8] c"FOO\00", align 1
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define hidden i8* @string_literal() {
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entry:
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; CHECK-LABEL: string_literal:
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; CHECK-NOT: .asciz
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; CHECK: .fnend
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ret i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i32 0, i32 0)
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}
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