76 lines
2.3 KiB
YAML
76 lines
2.3 KiB
YAML
# RUN: llc -mtriple=aarch64-unknown -run-pass aarch64-branch-relax -aarch64-tbz-offset-bits=4 %s -o - | FileCheck %s
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--- |
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; ModuleID = 'test.ll'
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source_filename = "test.ll"
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target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
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target triple = "aarch64-unknown"
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define void @test_stackmap_length(i32 %in) {
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%val = and i32 %in, 1
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%tst = icmp eq i32 %val, 0
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br i1 %tst, label %true, label %false
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true: ; preds = %0
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tail call void (i64, i32, ...) @llvm.experimental.stackmap(i64 0, i32 32)
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ret void
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false: ; preds = %0
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ret void
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}
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declare void @llvm.experimental.stackmap(i64, i32, ...)
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...
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---
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# CHECK-LABEL: name:{{.*}}test_stackmap_length
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# If the size of the stackmap is computed correctly, that will push
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# the bb.2.false block too far away from the TBNZW, so the branch will
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# have to be relaxed (note that we're using -aarch64-tbz-offset-bits to
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# constrain the range that can be reached with the TBNZW to something smaller
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# than what the stackmap is lowered to).
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# CHECK: TBZW killed %w0, 0, %bb.1.true
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# CHECK: B %bb.2.false
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name: test_stackmap_length
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alignment: 2
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exposesReturnsTwice: false
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legalized: false
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regBankSelected: false
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selected: false
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tracksRegLiveness: false
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liveins:
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- { reg: '%w0' }
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frameInfo:
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isFrameAddressTaken: false
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isReturnAddressTaken: false
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hasStackMap: true
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hasPatchPoint: false
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stackSize: 16
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offsetAdjustment: 0
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maxAlignment: 8
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adjustsStack: true
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hasCalls: true
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maxCallFrameSize: 0
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hasOpaqueSPAdjustment: false
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hasVAStart: false
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hasMustTailInVarArgFunc: false
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stack:
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- { id: 0, type: spill-slot, offset: -8, size: 8, alignment: 8, callee-saved-register: '%lr' }
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- { id: 1, type: spill-slot, offset: -16, size: 8, alignment: 8, callee-saved-register: '%fp' }
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body: |
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bb.0 (%ir-block.0):
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successors: %bb.1.true, %bb.2.false
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liveins: %w0, %lr, %fp
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TBNZW killed %w0, 0, %bb.2.false
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bb.1.true:
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successors: %bb.2.false
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liveins: %lr, %fp
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STACKMAP 0, 32, implicit-def dead early-clobber %x16, implicit-def dead early-clobber %x17, implicit-def dead early-clobber %lr
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bb.2.false:
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liveins: %lr, %fp
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RET killed %lr
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