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Remove from the TODO list those optimizations that are already handled by

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constant folding implemented in lib/Transforms/Utils/Local.cpp.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21604 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Spencer 2005-04-28 18:05:16 +00:00
parent 8441a01146
commit 5624c75f9f
1 changed files with 1 additions and 29 deletions
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30
lib/Transforms/IPO/SimplifyLibCalls.cpp
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@ -744,40 +744,21 @@ bool getConstantStringLength(Value* V, uint64_t& len )
// TODO:
// Additional cases that we need to add to this file:
//
// abs:
// * abs(cnst) -> cnst'
//
// atan:
// * atan(0.0) -> 0.0
// * atan(1.0) -> pi/4
//
// cbrt:
// * cbrt(constant) -> constant'
// * cbrt(expN(X)) -> expN(x/3)
// * cbrt(sqrt(x)) -> pow(x,1/6)
// * cbrt(sqrt(x)) -> pow(x,1/9)
//
// ceil, ceilf, ceill:
// * ceil(constant) -> constant'
//
// cos, cosf, cosl:
// * cos(0.0) -> 1.0
// * cox(-x) -> cos(x)
// * cos(-x) -> cos(x)
//
// exp, expf, expl:
// * exp(0.0) -> 1.0
// * exp(int) -> contant'
// * exp(log(x)) -> x
//
// fabs, fabsf, fabsl:
// * fabs(cnst) -> cnst'
//
// ffs, ffsl, ffsll:
// * ffs(cnst) -> cnst'
//
// floor, floorf, floorl:
// * floor(cnst) -> cnst'
//
// fprintf:
// * fprintf(file,fmt) -> fputs(fmt,file)
// (if fmt is constant and constains no % characters)
@ -797,7 +778,6 @@ bool getConstantStringLength(Value* V, uint64_t& len )
// * isdigit(c) -> (unsigned)(c) - '0' <= 9
//
// log, logf, logl:
// * log(1.0) -> 0.0
// * log(exp(x)) -> x
// * log(x**y) -> y*log(x)
// * log(exp(y)) -> y*log(e)
@ -829,9 +809,6 @@ bool getConstantStringLength(Value* V, uint64_t& len )
// (for n=1,2,4,8)
//
// pow, powf, powl:
// * pow(1.0,y) -> 1.0
// * pow(x,0.0) -> 1.0
// * pow(x,1.0) -> x
// * pow(x,-1.0) -> 1.0/x
// * pow(x,0.5) -> sqrt(x)
// * pow(cst1,cst2) -> const1**const2
@ -849,9 +826,6 @@ bool getConstantStringLength(Value* V, uint64_t& len )
// * signbit(cnst) -> cnst'
// * signbit(nncst) -> 0 (if pstv is a non-negative constant)
//
// sin, sinf, sinl:
// * sin(0.0) -> 0.0
//
// sprintf:
// * sprintf(dest,fmt) -> strcpy(dest,fmt)
// (if fmt is constant and constains no % characters)
@ -859,7 +833,6 @@ bool getConstantStringLength(Value* V, uint64_t& len )
// (only if the sprintf result is not used)
//
// sqrt, sqrtf, sqrtl:
// * sqrt(cnst) -> cnst'
// * sqrt(expN(x)) -> expN(x*0.5)
// * sqrt(Nroot(x)) -> pow(x,1/(2*N))
// * sqrt(pow(x,y)) -> pow(|x|,y*0.5)
@ -914,7 +887,6 @@ bool getConstantStringLength(Value* V, uint64_t& len )
// (if s1 and s2 are constant strings)
//
// tan, tanf, tanl:
// * tan(0.0) -> 0.0
// * tan(atan(x)) -> x
//
// toascii: