163c77b2e0
There is no instruction to fold NZCV, so, just do not do it. Without the fix the added test case crashes with an assert "Mismatched register size in non subreg COPY" Reviewed By: danilaml Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D127294
99 lines
8.1 KiB
YAML
99 lines
8.1 KiB
YAML
# RUN: llc -mtriple=aarch64-none-linux-gnu -run-pass greedy -verify-machineinstrs -o - %s | FileCheck %s
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--- |
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define i64 @test_subreg_spill_fold() { ret i64 0 }
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define i64 @test_subreg_spill_fold2() { ret i64 0 }
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define i64 @test_subreg_spill_fold3() { ret i64 0 }
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define i64 @test_subreg_fill_fold() { ret i64 0 }
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define double @test_subreg_fill_fold2() { ret double 0.0 }
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define i64 @test_nzcv_spill_fold() { ret i64 0 }
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...
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---
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# CHECK-LABEL: name: test_subreg_spill_fold
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# Ensure that the spilled subreg COPY is eliminated and folded into the spill store.
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name: test_subreg_spill_fold
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registers:
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- { id: 0, class: gpr64 }
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body: |
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bb.0:
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; CHECK: STRXui $xzr, %stack.0, 0 :: (store (s64) into %stack.0)
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undef %0.sub_32 = COPY $wzr
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INLINEASM &nop, 1, 12, implicit-def dead $x0, 12, implicit-def dead $x1, 12, implicit-def dead $x2, 12, implicit-def dead $x3, 12, implicit-def dead $x4, 12, implicit-def dead $x5, 12, implicit-def dead $x6, 12, implicit-def dead $x7, 12, implicit-def dead $x8, 12, implicit-def dead $x9, 12, implicit-def dead $x10, 12, implicit-def dead $x11, 12, implicit-def dead $x12, 12, implicit-def dead $x13, 12, implicit-def dead $x14, 12, implicit-def dead $x15, 12, implicit-def dead $x16, 12, implicit-def dead $x17, 12, implicit-def dead $x18, 12, implicit-def dead $x19, 12, implicit-def dead $x20, 12, implicit-def dead $x21, 12, implicit-def dead $x22, 12, implicit-def dead $x23, 12, implicit-def dead $x24, 12, implicit-def dead $x25, 12, implicit-def dead $x26, 12, implicit-def dead $x27, 12, implicit-def dead $x28, 12, implicit-def dead $fp, 12, implicit-def dead $lr, 12, implicit-def $sp
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$x0 = COPY %0
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RET_ReallyLR implicit $x0
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...
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---
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# CHECK-LABEL: name: test_subreg_spill_fold2
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# Similar to test_subreg_spill_fold, but with a %0 register class not containing %WZR.
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name: test_subreg_spill_fold2
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registers:
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- { id: 0, class: gpr64sp }
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body: |
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bb.0:
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; CHECK: STRXui $xzr, %stack.0, 0 :: (store (s64) into %stack.0)
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undef %0.sub_32 = COPY $wzr
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INLINEASM &nop, 1, 12, implicit-def dead $x0, 12, implicit-def dead $x1, 12, implicit-def dead $x2, 12, implicit-def dead $x3, 12, implicit-def dead $x4, 12, implicit-def dead $x5, 12, implicit-def dead $x6, 12, implicit-def dead $x7, 12, implicit-def dead $x8, 12, implicit-def dead $x9, 12, implicit-def dead $x10, 12, implicit-def dead $x11, 12, implicit-def dead $x12, 12, implicit-def dead $x13, 12, implicit-def dead $x14, 12, implicit-def dead $x15, 12, implicit-def dead $x16, 12, implicit-def dead $x17, 12, implicit-def dead $x18, 12, implicit-def dead $x19, 12, implicit-def dead $x20, 12, implicit-def dead $x21, 12, implicit-def dead $x22, 12, implicit-def dead $x23, 12, implicit-def dead $x24, 12, implicit-def dead $x25, 12, implicit-def dead $x26, 12, implicit-def dead $x27, 12, implicit-def dead $x28, 12, implicit-def dead $fp, 12, implicit-def dead $lr, 12, implicit-def $sp
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$x0 = ADDXri %0, 1, 0
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RET_ReallyLR implicit $x0
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...
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---
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# CHECK-LABEL: name: test_subreg_spill_fold3
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# Similar to test_subreg_spill_fold, but with a cross register class copy.
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name: test_subreg_spill_fold3
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registers:
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- { id: 0, class: fpr64 }
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body: |
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bb.0:
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; CHECK: STRXui $xzr, %stack.0, 0 :: (store (s64) into %stack.0)
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undef %0.ssub = COPY $wzr
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INLINEASM &nop, 1, 12, implicit-def dead $d0, 12, implicit-def dead $d1, 12, implicit-def dead $d2, 12, implicit-def dead $d3, 12, implicit-def dead $d4, 12, implicit-def dead $d5, 12, implicit-def dead $d6, 12, implicit-def dead $d7, 12, implicit-def dead $d8, 12, implicit-def dead $d9, 12, implicit-def dead $d10, 12, implicit-def dead $d11, 12, implicit-def dead $d12, 12, implicit-def dead $d13, 12, implicit-def dead $d14, 12, implicit-def dead $d15, 12, implicit-def dead $d16, 12, implicit-def dead $d17, 12, implicit-def dead $d18, 12, implicit-def dead $d19, 12, implicit-def dead $d20, 12, implicit-def dead $d21, 12, implicit-def dead $d22, 12, implicit-def dead $d23, 12, implicit-def dead $d24, 12, implicit-def dead $d25, 12, implicit-def dead $d26, 12, implicit-def dead $d27, 12, implicit-def dead $d28, 12, implicit-def dead $d29, 12, implicit-def dead $d30, 12, implicit-def $d31
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$x0 = COPY %0
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RET_ReallyLR implicit $x0
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...
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---
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# CHECK-LABEL: name: test_subreg_fill_fold
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# Ensure that the filled COPY is eliminated and folded into the fill load.
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name: test_subreg_fill_fold
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registers:
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- { id: 0, class: gpr32 }
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- { id: 1, class: gpr64 }
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body: |
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bb.0:
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%0 = COPY $wzr
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INLINEASM &nop, 1, 12, implicit-def dead $x0, 12, implicit-def dead $x1, 12, implicit-def dead $x2, 12, implicit-def dead $x3, 12, implicit-def dead $x4, 12, implicit-def dead $x5, 12, implicit-def dead $x6, 12, implicit-def dead $x7, 12, implicit-def dead $x8, 12, implicit-def dead $x9, 12, implicit-def dead $x10, 12, implicit-def dead $x11, 12, implicit-def dead $x12, 12, implicit-def dead $x13, 12, implicit-def dead $x14, 12, implicit-def dead $x15, 12, implicit-def dead $x16, 12, implicit-def dead $x17, 12, implicit-def dead $x18, 12, implicit-def dead $x19, 12, implicit-def dead $x20, 12, implicit-def dead $x21, 12, implicit-def dead $x22, 12, implicit-def dead $x23, 12, implicit-def dead $x24, 12, implicit-def dead $x25, 12, implicit-def dead $x26, 12, implicit-def dead $x27, 12, implicit-def dead $x28, 12, implicit-def dead $fp, 12, implicit-def dead $lr, 12, implicit-def $sp
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; CHECK: undef %1.sub_32:gpr64 = LDRWui %stack.0, 0 :: (load (s32) from %stack.0)
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undef %1.sub_32 = COPY %0
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$x0 = COPY %1
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RET_ReallyLR implicit $x0
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...
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---
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# CHECK-LABEL: name: test_subreg_fill_fold2
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# Similar to test_subreg_fill_fold, but with a cross-class copy.
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name: test_subreg_fill_fold2
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registers:
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- { id: 0, class: gpr32 }
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- { id: 1, class: fpr64 }
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body: |
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bb.0:
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%0 = COPY $wzr
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INLINEASM &nop, 1, 12, implicit-def dead $x0, 12, implicit-def dead $x1, 12, implicit-def dead $x2, 12, implicit-def dead $x3, 12, implicit-def dead $x4, 12, implicit-def dead $x5, 12, implicit-def dead $x6, 12, implicit-def dead $x7, 12, implicit-def dead $x8, 12, implicit-def dead $x9, 12, implicit-def dead $x10, 12, implicit-def dead $x11, 12, implicit-def dead $x12, 12, implicit-def dead $x13, 12, implicit-def dead $x14, 12, implicit-def dead $x15, 12, implicit-def dead $x16, 12, implicit-def dead $x17, 12, implicit-def dead $x18, 12, implicit-def dead $x19, 12, implicit-def dead $x20, 12, implicit-def dead $x21, 12, implicit-def dead $x22, 12, implicit-def dead $x23, 12, implicit-def dead $x24, 12, implicit-def dead $x25, 12, implicit-def dead $x26, 12, implicit-def dead $x27, 12, implicit-def dead $x28, 12, implicit-def dead $fp, 12, implicit-def dead $lr, 12, implicit-def $sp
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; CHECK: undef %1.ssub:fpr64 = LDRSui %stack.0, 0 :: (load (s32) from %stack.0)
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undef %1.ssub = COPY %0
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$d0 = COPY %1
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RET_ReallyLR implicit $d0
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...
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---
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# CHECK-LABEL: name: test_nzcv_spill_fold
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# Ensure that nzcv COPY cannot be folded.
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name: test_nzcv_spill_fold
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registers:
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- { id: 0, class: gpr64 }
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body: |
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bb.0:
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; CHECK: %1:gpr64 = COPY $nzcv
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; CHECK: STRXui %1, %stack.0, 0 :: (store (s64) into %stack.0)
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%0 = COPY $nzcv
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INLINEASM &nop, 1, 12, implicit-def dead $x0, 12, implicit-def dead $x1, 12, implicit-def dead $x2, 12, implicit-def dead $x3, 12, implicit-def dead $x4, 12, implicit-def dead $x5, 12, implicit-def dead $x6, 12, implicit-def dead $x7, 12, implicit-def dead $x8, 12, implicit-def dead $x9, 12, implicit-def dead $x10, 12, implicit-def dead $x11, 12, implicit-def dead $x12, 12, implicit-def dead $x13, 12, implicit-def dead $x14, 12, implicit-def dead $x15, 12, implicit-def dead $x16, 12, implicit-def dead $x17, 12, implicit-def dead $x18, 12, implicit-def dead $x19, 12, implicit-def dead $x20, 12, implicit-def dead $x21, 12, implicit-def dead $x22, 12, implicit-def dead $x23, 12, implicit-def dead $x24, 12, implicit-def dead $x25, 12, implicit-def dead $x26, 12, implicit-def dead $x27, 12, implicit-def dead $x28, 12, implicit-def dead $fp, 12, implicit-def dead $lr, 12, implicit-def $sp
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$x0 = COPY %0
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RET_ReallyLR implicit $x0
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...
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