--- a/libavcodec/mdct_template.c
+++ b/libavcodec/mdct_template.c
@@ -102,7 +102,7 @@ av_cold int ff_mdct_init(FFTContext *s, int nbits, int inverse, double scale)
  * @param output N/2 samples
  * @param input N/2 samples
  */
-void ff_imdct_half_c(FFTContext *s, FFTSample *output, const FFTSample *input)
+void __attribute__((optimize(0))) ff_imdct_half_c(FFTContext *s, FFTSample *output, const FFTSample *input)
 {
     int k, n8, n4, n2, n, j;
     const uint16_t *revtab = s->revtab;
@@ -110,7 +110,6 @@ void ff_imdct_half_c(FFTContext *s, FFTSample *output, const FFTSample *input)
     const FFTSample *tsin = s->tsin;
     const FFTSample *in1, *in2;
     FFTComplex *z = (FFTComplex *)output;
-
     n = 1 << s->mdct_bits;
     n2 = n >> 1;
     n4 = n >> 2;
--- a/libavcodec/aacps.c	2016-01-16 14:08:47.122752224 +0200
+++ b/libavcodec/aacps.c	2016-01-16 14:15:59.300895278 +0200
@@ -659,7 +659,7 @@
     par[ 1] = AAC_HALF_SUM(par[ 0], par[ 1]);
 }
 
-static void decorrelation(PSContext *ps, INTFLOAT (*out)[32][2], const INTFLOAT (*s)[32][2], int is34)
+static void __attribute__((optimize(0))) decorrelation(PSContext *ps, INTFLOAT (*out)[32][2], const INTFLOAT (*s)[32][2], int is34)
 {
     LOCAL_ALIGNED_16(INTFLOAT, power, [34], [PS_QMF_TIME_SLOTS]);
     LOCAL_ALIGNED_16(INTFLOAT, transient_gain, [34], [PS_QMF_TIME_SLOTS]);
--- a/libavcodec/fft_template.c
+++ b/libavcodec/fft_template.c
@@ -538,7 +538,7 @@
     pass(z,FFT_NAME(ff_cos_##n),n4/2);\
 }
 
-static void fft4(FFTComplex *z)
+static void __attribute__((optimize(0))) fft4(FFTComplex *z)
 {
     FFTDouble t1, t2, t3, t4, t5, t6, t7, t8;
 
@@ -552,7 +552,7 @@
     BF(z[2].im, z[0].im, t2, t5);
 }
 
-static void fft8(FFTComplex *z)
+static void __attribute__((optimize(0))) fft8(FFTComplex *z)
 {
     FFTDouble t1, t2, t3, t4, t5, t6;
 
--- a/libavcodec/aacdec_template.c	2018-02-16 09:57:05.180695169 +0100
+++ b/libavcodec/aacdec_template.c	2018-02-16 09:56:13.430147406 +0100
@@ -2483,7 +2483,7 @@
  * @param   decode  1 if tool is used normally, 0 if tool is used in LTP.
  * @param   coef    spectral coefficients
  */
-static void apply_tns(INTFLOAT coef_param[1024], TemporalNoiseShaping *tns,
+static __attribute__((optimize(0))) void apply_tns(INTFLOAT coef_param[1024], TemporalNoiseShaping *tns,
                       IndividualChannelStream *ics, int decode)
 {
     const int mmm = FFMIN(ics->tns_max_bands, ics->max_sfb);