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| author | J"orn Rennecke <joern.rennecke@st.com> | 2005-08-16 11:57:07 +0000 |
|---|---|---|
| committer | Joern Rennecke <amylaar@gcc.gnu.org> | 2005-08-16 12:57:07 +0100 |
| commit | 28f52a4d8eb0703eadd9eb19df729c69a6b5cd23 (patch) | |
| tree | 404fca0a018cd944cf88b31b1982060b87e4d818 /gcc/optabs.c | |
| parent | 546ad2d9fce6b9ed05b0634a9731db3609414c9d (diff) | |
| download | gcc-28f52a4d8eb0703eadd9eb19df729c69a6b5cd23.zip gcc-28f52a4d8eb0703eadd9eb19df729c69a6b5cd23.tar.gz gcc-28f52a4d8eb0703eadd9eb19df729c69a6b5cd23.tar.bz2 | |
re PR middle-end/20396 (TRULY_NOOP_TRUNCATION ignored)
2005-08-16 J"orn Rennecke <joern.rennecke@st.com>
Richard Shann <rshann@superh.com>
PR middle-end/20396:
* optabs.c (expand_binop): Take TRULY_NOOP_TRUNCATION into account.
Co-Authored-By: Richard Shann <rshann@superh.com>
From-SVN: r103153
Diffstat (limited to 'gcc/optabs.c')
| -rw-r--r-- | gcc/optabs.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/gcc/optabs.c b/gcc/optabs.c index 466a56c..9f73ac1 100644 --- a/gcc/optabs.c +++ b/gcc/optabs.c @@ -1184,7 +1184,9 @@ expand_binop (enum machine_mode mode, optab binoptab, rtx op0, rtx op1, if (temp != 0) { - if (GET_MODE_CLASS (mode) == MODE_INT) + if (GET_MODE_CLASS (mode) == MODE_INT + && TRULY_NOOP_TRUNCATION (GET_MODE_BITSIZE (mode), + GET_MODE_BITSIZE (GET_MODE (temp)))) return gen_lowpart (mode, temp); else return convert_to_mode (mode, temp, unsignedp); @@ -1231,7 +1233,9 @@ expand_binop (enum machine_mode mode, optab binoptab, rtx op0, rtx op1, unsignedp, OPTAB_DIRECT); if (temp) { - if (class != MODE_INT) + if (class != MODE_INT + || !TRULY_NOOP_TRUNCATION (GET_MODE_BITSIZE (mode), + GET_MODE_BITSIZE (wider_mode))) { if (target == 0) target = gen_reg_rtx (mode); @@ -1759,7 +1763,9 @@ expand_binop (enum machine_mode mode, optab binoptab, rtx op0, rtx op1, unsignedp, methods); if (temp) { - if (class != MODE_INT) + if (class != MODE_INT + || !TRULY_NOOP_TRUNCATION (GET_MODE_BITSIZE (mode), + GET_MODE_BITSIZE (wider_mode))) { if (target == 0) target = gen_reg_rtx (mode); |