derek.holloway
7502bf64a4
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48 lines
1.9 KiB
LLVM
48 lines
1.9 KiB
LLVM
; RUN: llc < %s
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; 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 i8] c"ioff = %u\09fval = 0x%p\09&fval[2] = 0x%p\0A\00" ; <ptr> [#uses=1]
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declare i32 @printf(ptr, ...)
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define i32 @main() {
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%fval = alloca %Results, i32 4 ; <ptr> [#uses=2]
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%i = add i32 1, 0 ; <i32> [#uses=1]
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%iscale = mul i32 %i, -1 ; <i32> [#uses=1]
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%ioff = add i32 %iscale, 3 ; <i32> [#uses=2]
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%ioff.upgrd.1 = zext i32 %ioff to i64 ; <i64> [#uses=1]
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%fptr = getelementptr %Results, ptr %fval, i64 %ioff.upgrd.1 ; <ptr> [#uses=1]
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%castFmt = getelementptr [39 x i8], ptr @fmtArg, i64 0, i64 0 ; <ptr> [#uses=1]
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call i32 (ptr, ...) @printf( ptr %castFmt, i32 %ioff, ptr %fval, ptr %fptr ) ; <i32>:1 [#uses=0]
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ret i32 0
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}
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