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50 lines
1.6 KiB
LLVM
50 lines
1.6 KiB
LLVM
; Test that a negative constant smaller than 64 bits (e.g., int)
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; is correctly implemented with sign-extension.
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; In particular, the current code generated is:
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;
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; main:
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; .L_main_LL_0:
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; save %o6, -224, %o6
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; setx .G_fmtArg_1, %o1, %o0
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; setuw 1, %o1 ! i = 1
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; setuw 4294967295, %o3 ! THE BUG: 0x00000000ffffffff
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; setsw 0, %i0
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; add %i6, 1999, %o2 ! fval
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; add %o1, %g0, %o1
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; add %o0, 0, %o0
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; mulx %o1, %o3, %o1 ! ERROR: 0xffffffff; should be -1
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; add %o1, 3, %o1 ! ERROR: 0x100000002; should be 0x2
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; mulx %o1, 12, %o3 !
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; add %o2, %o3, %o3 ! produces bad address!
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; call printf
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; nop
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; jmpl %i7+8, %g0
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; restore %g0, 0, %g0
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;
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; llc produces:
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; ioff = 2 fval = 0xffffffff7fffec90 &fval[2] = 0xb7fffeca8
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; instead of:
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; ioff = 2 fval = 0xffffffff7fffec90 &fval[2] = 0xffffffff7fffeca8
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;
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%Results = type { float, float, float }
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%fmtArg = internal global [39 x sbyte] c"ioff = %u\09fval = 0x%p\09&fval[2] = 0x%p\0A\00"; <[39 x sbyte]*> [#uses=1]
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implementation
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declare int "printf"(sbyte*, ...)
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int "main"()
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begin
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%fval = alloca %Results, uint 4
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%i = add uint 1, 0 ; i = 1
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%iscale = mul uint %i, 4294967295 ; i*-1 = -1
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%ioff = add uint %iscale, 3 ; 3+(-i) = 2
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%ioff = cast uint %ioff to long
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%fptr = getelementptr %Results* %fval, long %ioff ; &fval[2]
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%castFmt = getelementptr [39 x sbyte]* %fmtArg, long 0, long 0
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call int (sbyte*, ...)* %printf(sbyte* %castFmt, uint %ioff, %Results* %fval, %Results* %fptr)
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ret int 0
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end
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