0aef747b84
The motivation is that the update script has at least two deviations (`<...>@GOT`/`<...>@PLT`/ and not hiding pointer arithmetics) from what pretty much all the checklines were generated with, and most of the tests are still not updated, so each time one of the non-up-to-date tests is updated to see the effect of the code change, there is a lot of noise. Instead of having to deal with that each time, let's just deal with everything at once. This has been done via: ``` cd llvm-project/llvm/test/CodeGen/X86 grep -rl "; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py" | xargs -L1 <...>/llvm-project/llvm/utils/update_llc_test_checks.py --llc-binary <...>/llvm-project/build/bin/llc ``` Not all tests were regenerated, however.
43 lines
1.3 KiB
LLVM
43 lines
1.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -O2 -mtriple=x86_64-unknown-unknown | FileCheck %s
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; Checks that a zeroing mov is inserted for the trunc/zext pair even when
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; the source of the zext is an AssertZext node
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; PR28540
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define i64 @foo() {
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; CHECK-LABEL: foo:
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; CHECK: # %bb.0:
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; CHECK-NEXT: movq $-1, %rax
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; CHECK-NEXT: retq
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ret i64 -1
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}
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define i64 @main() {
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; CHECK-LABEL: main:
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; CHECK: # %bb.0:
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; CHECK-NEXT: pushq %rax
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; CHECK-NEXT: .cfi_def_cfa_offset 16
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; CHECK-NEXT: callq foo@PLT
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; CHECK-NEXT: movabsq $-4294967041, %rcx # imm = 0xFFFFFFFF000000FF
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; CHECK-NEXT: andq %rax, %rcx
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; CHECK-NEXT: movl %ecx, %ecx
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; CHECK-NEXT: leaq (,%rcx,8), %rax
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; CHECK-NEXT: subq %rcx, %rax
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; CHECK-NEXT: shrq $32, %rax
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; CHECK-NEXT: popq %rcx
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; CHECK-NEXT: .cfi_def_cfa_offset 8
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; CHECK-NEXT: retq
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%b = call i64 @foo()
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%or = and i64 %b, 18446744069414584575 ; this is 0xffffffff000000ff
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%trunc = trunc i64 %or to i32
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br label %l
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l:
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%ext = zext i32 %trunc to i64
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%mul = mul i64 %ext, 7
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br label %m
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m: ; keeps dag combine from seeing the multiply and the shift together
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%shr = lshr i64 %mul, 32
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trunc i64 %or to i32 ; keeps the and alive so it doesn't simplify
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ret i64 %shr
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}
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