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Another regression from the pattern isel

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llvm-svn: 25867
This commit is contained in:
Chris Lattner 2006-02-01 01:44:25 +00:00
parent fa15301572
commit 0e7d439232
1 changed files with 16 additions and 0 deletions
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16
lib/Target/X86/README.txt
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@ -288,3 +288,19 @@ _test:
This is bad for register pressure, though the dag isel is producing a
better schedule. :)
//===---------------------------------------------------------------------===//
This testcase should have no SSE instructions in it, and only one load from
a constant pool:
double %test3(bool %B) {
%C = select bool %B, double 123.412, double 523.01123123
ret double %C
}
Currently, the select is being lowered, which prevents the dag combiner from
turning 'select (load CPI1), (load CPI2)' -> 'load (select CPI1, CPI2)'
The pattern isel got this one right.