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Try harder to get the compiler to use float registers in different 

places to increase the chance of messing up any preserved registers.

llvm-svn: 207938
This commit is contained in:
Joerg Sonnenberger 2014-05-04 16:31:33 +00:00
parent e73333a50f
commit c72473d87b
1 changed files with 26 additions and 8 deletions
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34
libcxxabi/test/unwind_06.cpp
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@ -14,30 +14,38 @@
// Compile with -Os to get compiler uses float registers to hold float variables // Compile with -Os to get compiler uses float registers to hold float variables
__attribute__((noinline)) double get_(int x) { return (double)x; }
double get(int x) { return (double)x; }
double (* volatile get)(int) = get_;
volatile int counter;
double try1(bool v) { double try1(bool v) {
double a = get(0); double a = get(0);
double b = get(0); double b = get(1);
for (counter = 100; counter; --counter)
a += get(1) + b;
if (v) throw 10; if (v) throw 10;
return get(0)+a+b; return get(0)+a+b;
} }
double try2(bool v) { double try2(bool v) {
double a = get(0); double a = get(0);
double b = get(0); double b = get(1);
double c = get(0); double c = get(2);
for (counter = 100; counter; --counter)
a += get(1) + b + c;
if (v) throw 10; if (v) throw 10;
return get(0)+a+b+c; return get(0)+a+b+c;
} }
double try3(bool v) { double try3(bool v) {
double a = get(0); double a = get(0);
double b = get(0); double b = get(1);
double c = get(0); double c = get(2);
double d = get(0); double d = get(3);
for (counter = 100; counter; --counter)
a += get(1) + b + c + d;
if (v) throw 10; if (v) throw 10;
return get(0)+a+b+c+d; return get(0)+a+b+c+d;
} }
@ -48,6 +56,8 @@ double try4(bool v) {
double c = get(0); double c = get(0);
double d = get(0); double d = get(0);
double e = get(0); double e = get(0);
for (counter = 100; counter; --counter)
a += get(1) + b+c+d+e;
if (v) throw 10; if (v) throw 10;
return get(0)+a+b+c+d+e; return get(0)+a+b+c+d+e;
} }
@ -59,6 +69,8 @@ double try5(bool v) {
double d = get(0); double d = get(0);
double e = get(0); double e = get(0);
double f = get(0); double f = get(0);
for (counter = 100; counter; --counter)
a += get(1) + b+c+d+e+f;
if (v) throw 10; if (v) throw 10;
return get(0)+a+b+c+d+e+f; return get(0)+a+b+c+d+e+f;
} }
@ -71,6 +83,8 @@ double try6(bool v) {
double e = get(0); double e = get(0);
double f = get(0); double f = get(0);
double g = get(0); double g = get(0);
for (counter = 100; counter; --counter)
a += get(1) + b+c+d+e+f+g;
if (v) throw 10; if (v) throw 10;
return get(0)+a+b+c+d+e+f+g; return get(0)+a+b+c+d+e+f+g;
} }
@ -84,6 +98,8 @@ double try7(bool v) {
double f = get(0); double f = get(0);
double g = get(0); double g = get(0);
double h = get(0); double h = get(0);
for (counter = 100; counter; --counter)
a += get(1) + b+c+d+e+f+g;
if (v) throw 10; if (v) throw 10;
return get(0)+a+b+c+d+e+f+g; return get(0)+a+b+c+d+e+f+g;
} }
@ -98,6 +114,8 @@ double try8(bool v) {
double g = get(0); double g = get(0);
double h = get(0); double h = get(0);
double i = get(0); double i = get(0);
for (counter = 100; counter; --counter)
a += get(1) + b+c+d+e+f+g+i;
if (v) throw 10; if (v) throw 10;
return get(0)+a+b+c+d+e+f+g+i; return get(0)+a+b+c+d+e+f+g+i;
} }