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-rw-r--r--gcc/rtlanal.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/gcc/rtlanal.c b/gcc/rtlanal.c
index 69bc4fdd5e1..470c143fcf2 100644
--- a/gcc/rtlanal.c
+++ b/gcc/rtlanal.c
@@ -4483,8 +4483,8 @@ nonzero_bits1 (const_rtx x, machine_mode mode, const_rtx known_x,
int sign_index = GET_MODE_PRECISION (GET_MODE (x)) - 1;
int width0 = floor_log2 (nz0) + 1;
int width1 = floor_log2 (nz1) + 1;
- int low0 = floor_log2 (nz0 & -nz0);
- int low1 = floor_log2 (nz1 & -nz1);
+ int low0 = ctz_or_zero (nz0);
+ int low1 = ctz_or_zero (nz1);
unsigned HOST_WIDE_INT op0_maybe_minusp
= nz0 & (HOST_WIDE_INT_1U << sign_index);
unsigned HOST_WIDE_INT op1_maybe_minusp