ddd7d35c6c
When inline assembly code requests more registers than available, the MachineInstr::emitError function in the RegAllocFast pass emits an error but doesn't stop the pass, and then the compiler crashes later with an assertion failure. This commit, mimicking the RegAllocGreedy pass, assigns a random physical register, and therefore avoids the crash after producing the diagnostic. This problem has been observed for both rustc and clang, while it doesn't occur in gcc.
63 lines
3.7 KiB
LLVM
63 lines
3.7 KiB
LLVM
; RUN: not llc -verify-machineinstrs -O0 < %s 2>&1 | FileCheck %s
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; RUN: not --crash llc -verify-machineinstrs -O2 < %s 2>&1 | FileCheck %s --check-prefix=CHECK-O2
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; CHECK: error: inline assembly requires more registers than available
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; CHECK: .size main, .Lfunc_end0-main
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; CHECK-O2: error: inline assembly requires more registers than available
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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; Function Attrs: noinline nounwind optnone uwtable
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define dso_local i32 @main() #0 {
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entry:
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%r0 = alloca i32, align 4
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%r1 = alloca i32, align 4
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%r2 = alloca i32, align 4
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%r3 = alloca i32, align 4
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%r4 = alloca i32, align 4
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%r5 = alloca i32, align 4
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%r6 = alloca i32, align 4
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%r7 = alloca i32, align 4
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%r8 = alloca i32, align 4
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%r9 = alloca i32, align 4
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%r10 = alloca i32, align 4
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%r11 = alloca i32, align 4
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%r12 = alloca i32, align 4
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%r13 = alloca i32, align 4
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%r14 = alloca i32, align 4
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%0 = call { i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32 } asm "movl $$0, $0;movl $$1, $1;movl $$2, $2;movl $$3, $3;movl $$4, $4;movl $$5, $5;movl $$6, $6;movl $$7, $7;movl $$8, $8;movl $$9, $9;movl $$10, $10;movl $$11, $11;movl $$12, $12;movl $$13, $13;movl $$14, $14;", "=r,=r,=r,=r,=r,=r,=r,=r,=r,=r,=r,=r,=r,=r,=r,~{dirflag},~{fpsr},~{flags}"() #1
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%asmresult = extractvalue { i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32 } %0, 0
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%asmresult1 = extractvalue { i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32 } %0, 1
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%asmresult2 = extractvalue { i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32 } %0, 2
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%asmresult3 = extractvalue { i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32 } %0, 3
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%asmresult4 = extractvalue { i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32 } %0, 4
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%asmresult5 = extractvalue { i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32 } %0, 5
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%asmresult6 = extractvalue { i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32 } %0, 6
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%asmresult7 = extractvalue { i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32 } %0, 7
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%asmresult8 = extractvalue { i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32 } %0, 8
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%asmresult9 = extractvalue { i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32 } %0, 9
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%asmresult10 = extractvalue { i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32 } %0, 10
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%asmresult11 = extractvalue { i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32 } %0, 11
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%asmresult12 = extractvalue { i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32 } %0, 12
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%asmresult13 = extractvalue { i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32 } %0, 13
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%asmresult14 = extractvalue { i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32 } %0, 14
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store i32 %asmresult, ptr %r0, align 4
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store i32 %asmresult1, ptr %r1, align 4
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store i32 %asmresult2, ptr %r2, align 4
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store i32 %asmresult3, ptr %r3, align 4
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store i32 %asmresult4, ptr %r4, align 4
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store i32 %asmresult5, ptr %r5, align 4
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store i32 %asmresult6, ptr %r6, align 4
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store i32 %asmresult7, ptr %r7, align 4
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store i32 %asmresult8, ptr %r8, align 4
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store i32 %asmresult9, ptr %r9, align 4
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store i32 %asmresult10, ptr %r10, align 4
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store i32 %asmresult11, ptr %r11, align 4
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store i32 %asmresult12, ptr %r12, align 4
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store i32 %asmresult13, ptr %r13, align 4
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store i32 %asmresult14, ptr %r14, align 4
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ret i32 0
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}
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attributes #0 = { "frame-pointer"="all" }
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