45 lines
2.0 KiB
Diff
45 lines
2.0 KiB
Diff
See http://gcc.gnu.org/PR15068
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Fixes error
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../sysdeps/generic/s_fmax.c: In function `__fmax':
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../sysdeps/generic/s_fmax.c:28: internal compiler error: in elim_reg_cond, at flow.c:3257
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Please submit a full bug report,
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with preprocessed source if appropriate.
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See <URL:http://gcc.gnu.org/bugs.html> for instructions.
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make[2]: *** [/home/dank/wk/crosstool-0.28-rc35/build/arm-unknown-linux-gnu/gcc-3.4.1-glibc-20040822/build-glibc/math/s_fmax.o] Error 1
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make[2]: Leaving directory `/home/dank/wk/crosstool-0.28-rc35/build/arm-unknown-linux-gnu/gcc-3.4.1-glibc-20040822/glibc-20040822/math'
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make[1]: *** [math/others] Error 2
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make[1]: Leaving directory `/home/dank/wk/crosstool-0.28-rc35/build/arm-unknown-linux-gnu/gcc-3.4.1-glibc-20040822/glibc-20040822'
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make: *** [all] Error 2
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[ rediffed against gcc-3.4.1, with elbow grease, ending up with same thing as
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http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/flow.c.diff?cvsroot=gcc&only_with_tag=csl-arm-branch&r1=1.563.4.2&r2=1.563.4.3 ]
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--- a/gcc/flow.c
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+++ b/gcc/flow.c
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@@ -1884,6 +1884,7 @@ init_propagate_block_info (basic_block b
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rtx set_src = SET_SRC (pc_set (BB_END (bb)));
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rtx cond_true = XEXP (set_src, 0);
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rtx reg = XEXP (cond_true, 0);
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+ enum rtx_code inv_cond;
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if (GET_CODE (reg) == SUBREG)
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reg = SUBREG_REG (reg);
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@@ -1892,11 +1893,13 @@ init_propagate_block_info (basic_block b
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in the form of a comparison of a register against zero.
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If the condition is more complex than that, then it is safe
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not to record any information. */
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- if (GET_CODE (reg) == REG
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+ inv_cond = reversed_comparison_code (cond_true, BB_END (bb));
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+ if (inv_cond != UNKNOWN
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+ && GET_CODE (reg) == REG
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&& XEXP (cond_true, 1) == const0_rtx)
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{
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rtx cond_false
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- = gen_rtx_fmt_ee (reverse_condition (GET_CODE (cond_true)),
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+ = gen_rtx_fmt_ee (inv_cond,
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GET_MODE (cond_true), XEXP (cond_true, 0),
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XEXP (cond_true, 1));
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if (GET_CODE (XEXP (set_src, 1)) == PC)
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